{"id":567244,"date":"2026-07-20T14:12:28","date_gmt":"2026-07-20T07:12:28","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=567244"},"modified":"2026-07-22T14:49:50","modified_gmt":"2026-07-22T07:49:50","slug":"nhiet-dung-rieng","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/nhiet-dung-rieng\/","title":{"rendered":"Nhi\u1ec7t dung ri\u00eang l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c Q = mc\u0394t v\u00e0 b\u1ea3ng tra"},"content":{"rendered":"<p>Nhi\u1ec7t dung ri\u00eang l\u00e0 nhi\u1ec7t l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u00e0m 1kg m\u1ed9t ch\u1ea5t t\u0103ng th\u00eam 1\u00b0C (hay 1K), k\u00fd hi\u1ec7u c, \u0111\u01a1n v\u1ecb J\/kg.K. N\u01b0\u1edbc c\u00f3 c \u2248 4.200 J\/kg.K \u2013 cao h\u01a1n h\u1eb3n kim lo\u1ea1i \u2013 n\u00ean v\u1eeba l\u00e2u n\u00f3ng v\u1eeba l\u00e2u ngu\u1ed9i, \u0111\u00f3 l\u00e0 l\u00fd do n\u01b0\u1edbc \u0111\u01b0\u1ee3c ch\u1ecdn l\u00e0m ch\u1ea5t t\u1ea3n nhi\u1ec7t. \u0110\u1ea1i l\u01b0\u1ee3ng n\u00e0y g\u1eafn li\u1ec1n v\u1edbi c\u00f4ng th\u1ee9c t\u00ednh nhi\u1ec7t l\u01b0\u1ee3ng Q = mc\u0394t, xu\u1ea5t hi\u1ec7n xuy\u00ean su\u1ed1t ch\u01b0\u01a1ng tr\u00ecnh V\u1eadt l\u00fd 8 v\u00e0 V\u1eadt l\u00fd 12. N\u1ed9i dung d\u01b0\u1edbi \u0111\u00e2y t\u1ed5ng h\u1ee3p \u0111\u1ecbnh ngh\u0129a, c\u00f4ng th\u1ee9c, b\u1ea3ng tra nhi\u1ec7t dung ri\u00eang c\u1ee7a c\u00e1c ch\u1ea5t quen thu\u1ed9c, v\u00ed d\u1ee5 c\u00f3 l\u1eddi gi\u1ea3i t\u1eebng b\u01b0\u1edbc v\u00e0 nh\u1eefng c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p nh\u1ea5t khi b\u1ea1n \u00f4n t\u1eadp ho\u1eb7c gi\u1ea3i b\u00e0i t\u1eadp li\u00ean quan.<\/p>\n<h2>Nhi\u1ec7t dung ri\u00eang l\u00e0 g\u00ec?<\/h2>\n<p>Nhi\u1ec7t dung ri\u00eang l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u1eb7c tr\u01b0ng cho t\u1eebng ch\u1ea5t, cho bi\u1ebft nhi\u1ec7t l\u01b0\u1ee3ng c\u1ea7n cung c\u1ea5p \u0111\u1ec3 1kg ch\u1ea5t \u0111\u00f3 t\u0103ng th\u00eam 1 \u0111\u1ed9 (\u00b0C ho\u1eb7c K). Ch\u1ea5t n\u00e0o c\u00f3 nhi\u1ec7t dung ri\u00eang c\u00e0ng l\u1edbn th\u00ec c\u00e0ng &#8220;ch\u1eadm n\u00f3ng&#8221; v\u00e0 c\u0169ng ch\u1eadm ngu\u1ed9i, v\u00ec c\u00f9ng m\u1ed9t kh\u1ed1i l\u01b0\u1ee3ng ph\u1ea3i trao \u0111\u1ed5i nhi\u1ec1u nhi\u1ec7t h\u01a1n m\u1edbi thay \u0111\u1ed5i \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9. Nh\u1edd \u0111\u1ea1i l\u01b0\u1ee3ng n\u00e0y, b\u1ea1n so s\u00e1nh \u0111\u01b0\u1ee3c kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 v\u00e0 gi\u1eef nhi\u1ec7t gi\u1eefa c\u00e1c ch\u1ea5t kh\u00e1c nhau \u2013 v\u00ed d\u1ee5 v\u00ec sao n\u01b0\u1edbc n\u00f3ng ch\u1eadm h\u01a1n d\u1ea7u \u0103n, hay v\u00ec sao kim lo\u1ea1i n\u00f3ng l\u00ean g\u1ea7n nh\u01b0 ngay l\u1eadp t\u1ee9c khi \u0111\u1ec3 ngo\u00e0i n\u1eafng.<\/p>\n<p>Nhi\u1ec7t dung ri\u00eang \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u l\u00e0 c, \u0111\u01a1n v\u1ecb chu\u1ea9n trong h\u1ec7 SI l\u00e0 J\/kg.K, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng J\/kg.\u00b0C v\u00ec m\u1ed9t kho\u1ea3ng ch\u00eanh 1K b\u1eb1ng \u0111\u00fang 1\u00b0C. Theo <a href=\"https:\/\/vi.wikipedia.org\/wiki\/Nhi%E1%BB%87t_dung_ri%C3%AAng\" target=\"_blank\" rel=\"noopener noreferrer\">Wikipedia ti\u1ebfng Vi\u1ec7t<\/a>, \u0111\u00e2y l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng v\u1eadt l\u00fd d\u00f9ng \u0111\u1ec3 so s\u00e1nh kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 nhi\u1ec7t gi\u1eefa c\u00e1c ch\u1ea5t kh\u00e1c nhau. Gi\u00e1 tr\u1ecb c ph\u1ee5 thu\u1ed9c v\u00e0o b\u1ea3n ch\u1ea5t v\u00e0 tr\u1ea1ng th\u00e1i (r\u1eafn, l\u1ecfng, kh\u00ed) c\u1ee7a ch\u1ea5t \u2013 c\u00f9ng l\u00e0 n\u01b0\u1edbc nh\u01b0ng \u1edf th\u1ec3 r\u1eafn (n\u01b0\u1edbc \u0111\u00e1) v\u00e0 th\u1ec3 l\u1ecfng l\u1ea1i c\u00f3 nhi\u1ec7t dung ri\u00eang kh\u00e1c nhau, chi ti\u1ebft \u1edf b\u1ea3ng tra b\u00ean d\u01b0\u1edbi.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-567713 aligncenter\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/nhiet-dung-rieng-1.jpg\" alt=\"nhiet-dung-rieng-1\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/nhiet-dung-rieng-1.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/nhiet-dung-rieng-1-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/nhiet-dung-rieng-1-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>&nbsp;<\/p>\n<h2>C\u00f4ng th\u1ee9c t\u00ednh nhi\u1ec7t l\u01b0\u1ee3ng<\/h2>\n<p>Nhi\u1ec7t dung ri\u00eang g\u1eafn li\u1ec1n v\u1edbi c\u00f4ng th\u1ee9c t\u00ednh nhi\u1ec7t l\u01b0\u1ee3ng thu v\u00e0o ho\u1eb7c t\u1ecfa ra khi m\u1ed9t v\u1eadt thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9:<\/p>\n<p>Q = m \u00b7 c \u00b7 \u0394t<\/p>\n<ul>\n<li>Q: nhi\u1ec7t l\u01b0\u1ee3ng thu v\u00e0o ho\u1eb7c t\u1ecfa ra (\u0111\u01a1n v\u1ecb J \u2013 Jun).<\/li>\n<li>m: kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt (kg).<\/li>\n<li>c: nhi\u1ec7t dung ri\u00eang c\u1ee7a ch\u1ea5t (J\/kg.K).<\/li>\n<li>\u0394t: \u0111\u1ed9 t\u0103ng (ho\u1eb7c gi\u1ea3m) nhi\u1ec7t \u0111\u1ed9, \u0394t = t\u2082 \u2212 t\u2081 (\u00b0C ho\u1eb7c K).<\/li>\n<\/ul>\n<p>N\u1ebfu \u0394t &gt; 0 (nhi\u1ec7t \u0111\u1ed9 t\u0103ng), v\u1eadt thu nhi\u1ec7t; n\u1ebfu \u0394t &lt; 0 (nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m), v\u1eadt t\u1ecfa nhi\u1ec7t. Khi c\u1ea7n t\u00ecm m\u1ed9t \u0111\u1ea1i l\u01b0\u1ee3ng kh\u00e1c thay v\u00ec Q, b\u1ea1n ch\u1ec9 c\u1ea7n bi\u1ebfn \u0111\u1ed5i c\u00f4ng th\u1ee9c g\u1ed1c:<\/p>\n<ul>\n<li>T\u00ednh nhi\u1ec7t dung ri\u00eang: c = Q \/ (m \u00b7 \u0394t)<\/li>\n<li>T\u00ednh kh\u1ed1i l\u01b0\u1ee3ng: m = Q \/ (c \u00b7 \u0394t)<\/li>\n<li>T\u00ednh \u0111\u1ed9 ch\u00eanh nhi\u1ec7t \u0111\u1ed9: \u0394t = Q \/ (m \u00b7 c)<\/li>\n<\/ul>\n<p><strong>Xem th\u00eam: <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/dien-tich-hinh-tron\/\">C\u00f4ng Th\u1ee9c T\u00ednh Di\u1ec7n T\u00edch H\u00ecnh Tr\u00f2n: C\u00e1ch T\u00ednh, V\u00ed D\u1ee5 &amp; B\u00e0i T\u1eadp<\/a><\/strong><\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-567714 aligncenter\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/nhiet-dung-rieng-2.jpg\" alt=\"nhiet-dung-rieng-2\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/nhiet-dung-rieng-2.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/nhiet-dung-rieng-2-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/nhiet-dung-rieng-2-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>B\u1ea3ng nhi\u1ec7t dung ri\u00eang c\u1ee7a m\u1ed9t s\u1ed1 ch\u1ea5t<\/h2>\n<p>Nhi\u1ec7t dung ri\u00eang c\u1ee7a m\u1ed7i ch\u1ea5t l\u00e0 h\u1eb1ng s\u1ed1 \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111o \u0111\u1ea1c th\u1ef1c nghi\u1ec7m, b\u1ea1n c\u00f3 th\u1ec3 tra tr\u1ef1c ti\u1ebfp thay v\u00ec t\u1ef1 \u0111o. B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y t\u1ed5ng h\u1ee3p gi\u00e1 tr\u1ecb g\u1ea7n \u0111\u00fang c\u1ee7a m\u1ed9t s\u1ed1 ch\u1ea5t quen thu\u1ed9c, d\u00f9ng cho h\u1ea7u h\u1ebft b\u00e0i t\u1eadp t\u1eeb THCS \u0111\u1ebfn THPT:<\/p>\n<table>\n<thead>\n<tr>\n<th>Ch\u1ea5t<\/th>\n<th>Nhi\u1ec7t dung ri\u00eang (J\/kg.K)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>N\u01b0\u1edbc<\/td>\n<td>4.200<\/td>\n<\/tr>\n<tr>\n<td>R\u01b0\u1ee3u, c\u1ed3n (etanol)<\/td>\n<td>2.500<\/td>\n<\/tr>\n<tr>\n<td>N\u01b0\u1edbc \u0111\u00e1<\/td>\n<td>1.800<\/td>\n<\/tr>\n<tr>\n<td>Kh\u00f4ng kh\u00ed<\/td>\n<td>\u2248 1.005<\/td>\n<\/tr>\n<tr>\n<td>Nh\u00f4m<\/td>\n<td>880<\/td>\n<\/tr>\n<tr>\n<td>Th\u1ee7y tinh<\/td>\n<td>840<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ea5t<\/td>\n<td>800<\/td>\n<\/tr>\n<tr>\n<td>S\u1eaft, th\u00e9p<\/td>\n<td>460<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed3ng<\/td>\n<td>380<\/td>\n<\/tr>\n<tr>\n<td>Ch\u00ec<\/td>\n<td>130<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>C\u00f3 th\u1ec3 th\u1ea5y n\u01b0\u1edbc c\u00f3 nhi\u1ec7t dung ri\u00eang l\u1edbn h\u01a1n h\u1eb3n ph\u1ea7n l\u1edbn ch\u1ea5t r\u1eafn v\u00e0 kim lo\u1ea1i, \u0111\u00f3 l\u00e0 l\u00fd do n\u01b0\u1edbc \u0111\u01b0\u1ee3c d\u00f9ng l\u00e0m ch\u1ea5t t\u1ea3n nhi\u1ec7t, l\u00e0m m\u00e1t \u0111\u1ed9ng c\u01a1 v\u00e0 \u0111i\u1ec1u h\u00f2a kh\u00ed h\u1eadu \u1edf quy m\u00f4 l\u1edbn (bi\u1ec3n, h\u1ed3). Ng\u01b0\u1ee3c l\u1ea1i, kim lo\u1ea1i nh\u01b0 \u0111\u1ed3ng hay ch\u00ec c\u00f3 nhi\u1ec7t dung ri\u00eang nh\u1ecf n\u00ean n\u00f3ng l\u00ean v\u00e0 ngu\u1ed9i \u0111i r\u1ea5t nhanh \u2013 \u0111\u1eb7c \u0111i\u1ec3m \u0111\u01b0\u1ee3c t\u1eadn d\u1ee5ng khi ch\u1ebf t\u1ea1o \u0111\u00e1y n\u1ed3i, ch\u1ea3o \u0111\u1ec3 truy\u1ec1n nhi\u1ec7t nhanh.<\/p>\n<h2>Nhi\u1ec7t dung ri\u00eang kh\u00e1c nhi\u1ec7t dung nh\u01b0 th\u1ebf n\u00e0o?<\/h2>\n<p>Nhi\u1ec7t dung ri\u00eang (c) l\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a 1kg ch\u1ea5t, c\u00f2n nhi\u1ec7t dung (k\u00fd hi\u1ec7u C, \u0111\u01a1n v\u1ecb J\/K) l\u00e0 nhi\u1ec7t l\u01b0\u1ee3ng c\u1ea7n \u0111\u1ec3 c\u1ea3 m\u1ed9t v\u1eadt c\u1ee5 th\u1ec3 t\u0103ng th\u00eam 1 \u0111\u1ed9, t\u00ednh theo c\u00f4ng th\u1ee9c C = m \u00b7 c. Hai \u0111\u1ea1i l\u01b0\u1ee3ng d\u1ec5 g\u00e2y nh\u1ea7m v\u00ec t\u00ean g\u1ecdi g\u1ea7n gi\u1ed1ng nhau, nh\u01b0ng nhi\u1ec7t dung ri\u00eang kh\u00f4ng \u0111\u1ed5i theo kh\u1ed1i l\u01b0\u1ee3ng (l\u00e0 h\u1eb1ng s\u1ed1 c\u1ee7a ch\u1ea5t), c\u00f2n nhi\u1ec7t dung ph\u1ee5 thu\u1ed9c v\u00e0o kh\u1ed1i l\u01b0\u1ee3ng th\u1ef1c t\u1ebf c\u1ee7a v\u1eadt.<\/p>\n<p>V\u00ed d\u1ee5, 1kg n\u01b0\u1edbc c\u00f3 nhi\u1ec7t dung ri\u00eang 4.200 J\/kg.K, nh\u01b0ng m\u1ed9t b\u1ec3 ch\u1ee9a 200kg n\u01b0\u1edbc c\u00f3 nhi\u1ec7t dung C = 200 \u00d7 4.200 = 840.000 J\/K \u2013 t\u1ee9c c\u1ea7n l\u01b0\u1ee3ng nhi\u1ec7t l\u1edbn h\u01a1n 200 l\u1ea7n \u0111\u1ec3 t\u0103ng c\u00f9ng 1 \u0111\u1ed9 so v\u1edbi 1kg n\u01b0\u1edbc. Khi gi\u1ea3i b\u00e0i t\u1eadp, b\u1ea1n c\u1ea7n x\u00e1c \u0111\u1ecbnh r\u00f5 \u0111\u1ec1 cho c (c\u1ee7a ch\u1ea5t) hay C (c\u1ee7a c\u1ea3 v\u1eadt) \u0111\u1ec3 thay \u0111\u00fang v\u00e0o c\u00f4ng th\u1ee9c Q = mc\u0394t ho\u1eb7c Q = C\u0394t.<\/p>\n<h2>V\u00ed d\u1ee5 t\u00ednh nhi\u1ec7t l\u01b0\u1ee3ng v\u1edbi nhi\u1ec7t dung ri\u00eang<\/h2>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 4 v\u00ed d\u1ee5 \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c Q = mc\u0394t v\u00e0 b\u1ea3ng tra \u1edf tr\u00ean, k\u00e8m l\u1eddi gi\u1ea3i t\u1eebng b\u01b0\u1edbc \u0111\u1ec3 b\u1ea1n \u0111\u1ed1i chi\u1ebfu khi t\u1ef1 l\u00e0m b\u00e0i.<\/p>\n<h3>V\u00ed d\u1ee5 1: T\u00ednh nhi\u1ec7t l\u01b0\u1ee3ng khi \u0111un n\u01b0\u1edbc<\/h3>\n<p>C\u1ea7n bao nhi\u00eau nhi\u1ec7t l\u01b0\u1ee3ng \u0111\u1ec3 \u0111un 2kg n\u01b0\u1edbc t\u1eeb 25\u00b0C l\u00ean 75\u00b0C?<\/p>\n<p>T\u00f3m t\u1eaft: m = 2kg, c = 4.200 J\/kg.K, t\u2081 = 25\u00b0C, t\u2082 = 75\u00b0C.<\/p>\n<p>Gi\u1ea3i: \u0394t = t\u2082 \u2212 t\u2081 = 75 \u2212 25 = 50\u00b0C. Q = m \u00b7 c \u00b7 \u0394t = 2 \u00d7 4.200 \u00d7 50 = 420.000 J (420kJ). V\u1eady c\u1ea7n 420.000 J \u0111\u1ec3 \u0111un l\u01b0\u1ee3ng n\u01b0\u1edbc tr\u00ean n\u00f3ng th\u00eam 50\u00b0C.<\/p>\n<h3>V\u00ed d\u1ee5 2: T\u00ednh \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9<\/h3>\n<p>M\u1ed9t mi\u1ebfng nh\u00f4m 0,5kg thu v\u00e0o 8.800 J nhi\u1ec7t l\u01b0\u1ee3ng th\u00ec nhi\u1ec7t \u0111\u1ed9 t\u0103ng th\u00eam bao nhi\u00eau?<\/p>\n<p>T\u00f3m t\u1eaft: m = 0,5kg, c = 880 J\/kg.K, Q = 8.800 J.<\/p>\n<p>Gi\u1ea3i: \u0394t = Q \/ (m \u00b7 c) = 8.800 \/ (0,5 \u00d7 880) = 8.800 \/ 440 = 20\u00b0C. V\u1eady mi\u1ebfng nh\u00f4m t\u0103ng th\u00eam 20\u00b0C.<\/p>\n<h3>V\u00ed d\u1ee5 3: T\u00ednh nhi\u1ec7t l\u01b0\u1ee3ng c\u1ea7n cho kh\u1ed1i s\u1eaft<\/h3>\n<p>M\u1ed9t kh\u1ed1i s\u1eaft 1kg t\u0103ng nhi\u1ec7t \u0111\u1ed9 th\u00eam 10\u00b0C th\u00ec c\u1ea7n cung c\u1ea5p bao nhi\u00eau nhi\u1ec7t l\u01b0\u1ee3ng?<\/p>\n<p>T\u00f3m t\u1eaft: m = 1kg, c = 460 J\/kg.K, \u0394t = 10\u00b0C.<\/p>\n<p>Gi\u1ea3i: Q = m \u00b7 c \u00b7 \u0394t = 1 \u00d7 460 \u00d7 10 = 4.600 J. V\u1eady c\u1ea7n 4.600 J \u0111\u1ec3 kh\u1ed1i s\u1eaft n\u00e0y n\u00f3ng th\u00eam 10\u00b0C.<\/p>\n<h3>V\u00ed d\u1ee5 4: Ph\u01b0\u01a1ng tr\u00ecnh c\u00e2n b\u1eb1ng nhi\u1ec7t khi tr\u1ed9n hai kh\u1ed1i n\u01b0\u1edbc<\/h3>\n<p>\u0110\u1ed5 0,2kg n\u01b0\u1edbc \u1edf 80\u00b0C v\u00e0o 0,3kg n\u01b0\u1edbc \u1edf 20\u00b0C, b\u1ecf qua trao \u0111\u1ed5i nhi\u1ec7t v\u1edbi m\u00f4i tr\u01b0\u1eddng v\u00e0 b\u00ecnh ch\u1ee9a. Nhi\u1ec7t \u0111\u1ed9 c\u00e2n b\u1eb1ng cu\u1ed1i c\u00f9ng l\u00e0 bao nhi\u00eau?<\/p>\n<p>T\u00f3m t\u1eaft: m\u2081 = 0,2kg, t\u2081 = 80\u00b0C; m\u2082 = 0,3kg, t\u2082 = 20\u00b0C; c\u00f9ng l\u00e0 n\u01b0\u1edbc n\u00ean c nh\u01b0 nhau.<\/p>\n<p>Gi\u1ea3i: \u00c1p d\u1ee5ng ph\u01b0\u01a1ng tr\u00ecnh c\u00e2n b\u1eb1ng nhi\u1ec7t Qt\u1ecfa = Qthu: m\u2081 \u00b7 c \u00b7 (t\u2081 \u2212 t) = m\u2082 \u00b7 c \u00b7 (t \u2212 t\u2082), t\u1ee9c 0,2 \u00d7 (80 \u2212 t) = 0,3 \u00d7 (t \u2212 20). Suy ra 16 \u2212 0,2t = 0,3t \u2212 6, n\u00ean 22 = 0,5t, v\u1eady t = 44\u00b0C. Nhi\u1ec7t \u0111\u1ed9 c\u00e2n b\u1eb1ng c\u1ee7a h\u1ed7n h\u1ee3p l\u00e0 44\u00b0C.<\/p>\n<p><strong>Xem th\u00eam: <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/cong-thuc-tinh-quang-duong\/\">C\u00f4ng Th\u1ee9c T\u00ednh Qu\u00e3ng \u0110\u01b0\u1eddng: C\u00e1ch T\u00ednh To\u00e1n L\u1edbp 5 &amp; V\u1eadt L\u00fd L\u1edbp 8<\/a><\/strong><\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-567715 aligncenter\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/nhiet-dung-rieng-3.jpg\" alt=\"nhiet-dung-rieng-3\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/nhiet-dung-rieng-3.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/nhiet-dung-rieng-3-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/nhiet-dung-rieng-3-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>\u1ee8ng d\u1ee5ng c\u1ee7a nhi\u1ec7t dung ri\u00eang trong \u0111\u1eddi s\u1ed1ng<\/h2>\n<p>Kh\u00f4ng ch\u1ec9 n\u1eb1m trong s\u00e1ch gi\u00e1o khoa, nhi\u1ec7t dung ri\u00eang c\u00f2n gi\u1ea3i th\u00edch nhi\u1ec1u hi\u1ec7n t\u01b0\u1ee3ng v\u00e0 l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u quen thu\u1ed9c quanh b\u1ea1n:<\/p>\n<ul>\n<li>N\u01b0\u1edbc l\u00e0m m\u00e1t \u0111\u1ed9ng c\u01a1, \u0111i\u1ec1u h\u00f2a nhi\u1ec7t \u0111\u1ed9: nh\u1edd nhi\u1ec7t dung ri\u00eang l\u1edbn, n\u01b0\u1edbc h\u1ea5p th\u1ee5 nhi\u1ec1u nhi\u1ec7t m\u00e0 kh\u00f4ng t\u0103ng nhi\u1ec7t \u0111\u1ed9 qu\u00e1 nhanh, ph\u00f9 h\u1ee3p l\u00e0m dung d\u1ecbch t\u1ea3n nhi\u1ec7t cho \u00f4 t\u00f4, m\u00e1y m\u00f3c.<\/li>\n<li>\u0110\u00e1y n\u1ed3i, ch\u1ea3o b\u1eb1ng kim lo\u1ea1i: nh\u00f4m, \u0111\u1ed3ng c\u00f3 nhi\u1ec7t dung ri\u00eang nh\u1ecf n\u00ean n\u00f3ng l\u00ean nhanh, gi\u00fap n\u1ea5u \u0103n ti\u1ebft ki\u1ec7m th\u1eddi gian v\u00e0 n\u0103ng l\u01b0\u1ee3ng.<\/li>\n<li>C\u00e1n n\u1ed3i, tay c\u1ea7m b\u1eb1ng nh\u1ef1a ho\u1eb7c g\u1ed7: c\u00e1c v\u1eadt li\u1ec7u n\u00e0y d\u1eabn nhi\u1ec7t k\u00e9m, kh\u00f4ng truy\u1ec1n nhi\u1ec7t nhanh v\u00e0o tay b\u1ea1n khi n\u1ea5u.<\/li>\n<li>Gi\u00f3 bi\u1ec3n ban ng\u00e0y, ban \u0111\u00eam: \u0111\u1ea5t li\u1ec1n n\u00f3ng l\u00ean v\u00e0 ngu\u1ed9i \u0111i nhanh h\u01a1n bi\u1ec3n do nhi\u1ec7t dung ri\u00eang th\u1ea5p h\u01a1n n\u01b0\u1edbc, t\u1ea1o ra ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 sinh ra gi\u00f3.<\/li>\n<\/ul>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 nhi\u1ec7t dung ri\u00eang<\/h2>\n<h3>Nhi\u1ec7t dung ri\u00eang l\u00e0 g\u00ec?<\/h3>\n<p>L\u00e0 nhi\u1ec7t l\u01b0\u1ee3ng c\u1ea7n \u0111\u1ec3 l\u00e0m 1kg m\u1ed9t ch\u1ea5t t\u0103ng th\u00eam 1\u00b0C (ho\u1eb7c 1K), k\u00fd hi\u1ec7u c.<\/p>\n<h3>\u0110\u01a1n v\u1ecb c\u1ee7a nhi\u1ec7t dung ri\u00eang l\u00e0 g\u00ec?<\/h3>\n<p>L\u00e0 J\/kg.K trong h\u1ec7 SI, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng J\/kg.\u00b0C.<\/p>\n<h3>C\u00f4ng th\u1ee9c t\u00ednh nhi\u1ec7t l\u01b0\u1ee3ng l\u00e0 g\u00ec?<\/h3>\n<p>Q = m \u00b7 c \u00b7 \u0394t, trong \u0111\u00f3 m l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng (kg), c l\u00e0 nhi\u1ec7t dung ri\u00eang (J\/kg.K), \u0394t l\u00e0 \u0111\u1ed9 ch\u00eanh nhi\u1ec7t \u0111\u1ed9 (\u00b0C ho\u1eb7c K).<\/p>\n<h3>Nhi\u1ec7t dung ri\u00eang c\u1ee7a n\u01b0\u1edbc l\u00e0 bao nhi\u00eau?<\/h3>\n<p>Kho\u1ea3ng 4.200 J\/kg.K, thu\u1ed9c nh\u00f3m cao nh\u1ea5t trong c\u00e1c ch\u1ea5t th\u00f4ng d\u1ee5ng.<\/p>\n<h3>V\u00ec sao n\u01b0\u1edbc \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 l\u00e0m m\u00e1t?<\/h3>\n<p>V\u00ec n\u01b0\u1edbc c\u00f3 nhi\u1ec7t dung ri\u00eang l\u1edbn, h\u1ea5p th\u1ee5 \u0111\u01b0\u1ee3c nhi\u1ec1u nhi\u1ec7t m\u00e0 nhi\u1ec7t \u0111\u1ed9 t\u0103ng ch\u1eadm, n\u00ean t\u1ea3n nhi\u1ec7t hi\u1ec7u qu\u1ea3 h\u01a1n ph\u1ea7n l\u1edbn ch\u1ea5t l\u1ecfng v\u00e0 kim lo\u1ea1i kh\u00e1c.<\/p>\n<h3>Nhi\u1ec7t dung ri\u00eang v\u00e0 nhi\u1ec7t dung kh\u00e1c nhau ra sao?<\/h3>\n<p>Nhi\u1ec7t dung ri\u00eang (c) l\u00e0 h\u1eb1ng s\u1ed1 c\u1ee7a 1kg ch\u1ea5t; nhi\u1ec7t dung (C = m\u00b7c) l\u00e0 nhi\u1ec7t l\u01b0\u1ee3ng c\u1ea7n cho c\u1ea3 m\u1ed9t v\u1eadt c\u1ee5 th\u1ec3, ph\u1ee5 thu\u1ed9c kh\u1ed1i l\u01b0\u1ee3ng th\u1ef1c t\u1ebf.<\/p>\n<h3>V\u00ec sao kim lo\u1ea1i n\u00f3ng l\u00ean v\u00e0 ngu\u1ed9i \u0111i nhanh h\u01a1n n\u01b0\u1edbc?<\/h3>\n<p>V\u00ec kim lo\u1ea1i c\u00f3 nhi\u1ec7t dung ri\u00eang nh\u1ecf h\u01a1n n\u01b0\u1edbc nhi\u1ec1u l\u1ea7n, n\u00ean ch\u1ec9 c\u1ea7n \u00edt nhi\u1ec7t l\u01b0\u1ee3ng c\u0169ng \u0111\u1ee7 l\u00e0m nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i nhanh.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>T\u00f3m l\u1ea1i, nhi\u1ec7t dung ri\u00eang (c) l\u00e0 nhi\u1ec7t l\u01b0\u1ee3ng c\u1ea7n cung c\u1ea5p \u0111\u1ec3 1kg m\u1ed9t ch\u1ea5t t\u0103ng th\u00eam 1\u00b0C, g\u1eafn li\u1ec1n v\u1edbi c\u00f4ng th\u1ee9c Q = m \u00b7 c \u00b7 \u0394t. N\u1eafm v\u1eefng \u0111\u1ecbnh ngh\u0129a, b\u1ea3ng tra v\u00e0 c\u00e1ch bi\u1ebfn \u0111\u1ed5i c\u00f4ng th\u1ee9c gi\u00fap b\u1ea1n gi\u1ea3i nhanh c\u00e1c b\u00e0i to\u00e1n v\u1ec1 nhi\u1ec7t l\u01b0\u1ee3ng, ph\u01b0\u01a1ng tr\u00ecnh c\u00e2n b\u1eb1ng nhi\u1ec7t v\u00e0 hi\u1ec3u th\u00eam nhi\u1ec1u hi\u1ec7n t\u01b0\u1ee3ng \u0111\u1eddi s\u1ed1ng quanh m\u00ecnh. \u0110\u1ec3 \u00f4n th\u00eam c\u00e1c c\u00f4ng th\u1ee9c li\u00ean quan, m\u1eddi b\u1ea1n tham kh\u1ea3o <strong><a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/1-kilogam-kg-bang-bao-nhieu-gam-g\/\">1kg b\u1eb1ng bao nhi\u00eau gam<\/a>, <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/cong-thuc-tinh-quang-duong\/\">c\u00f4ng th\u1ee9c t\u00ednh qu\u00e3ng \u0111\u01b0\u1eddng<\/a><\/strong>, <strong><a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/cong-thuc-tinh-van-toc\/\">c\u00f4ng th\u1ee9c t\u00ednh v\u1eadn t\u1ed1c<\/a><\/strong> v\u00e0 <strong><a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/1-nam-anh-sang-bang-bao-nhieu-km\/\">m\u1ed9t n\u0103m \u00e1nh s\u00e1ng b\u1eb1ng bao nhi\u00eau km<\/a><\/strong> tr\u00ean chuy\u00ean m\u1ee5c tin t\u1ee9c c\u1ee7a Ho\u00e0ng H\u00e0 Mobile.<\/p>\n<p>N\u1ebfu b\u1ea1n c\u1ea7n t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt li\u1ec7u tr\u01b0\u1edbc khi tra b\u1ea3ng nhi\u1ec7t dung ri\u00eang, c\u00f3 th\u1ec3 xem th\u00eam b\u00e0i <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/khoi-luong-rieng\/\">kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang l\u00e0 g\u00ec<\/a> \u0111\u1ec3 n\u1eafm c\u00f4ng th\u1ee9c D = m\/V.<\/p>\n<p><script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Nhi\u1ec7t dung ri\u00eang l\u00e0 g\u00ec?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"L\u00e0 nhi\u1ec7t l\u01b0\u1ee3ng c\u1ea7n \u0111\u1ec3 l\u00e0m 1kg m\u1ed9t ch\u1ea5t t\u0103ng th\u00eam 1\u00b0C (ho\u1eb7c 1K), k\u00fd hi\u1ec7u c.\"}},{\"@type\":\"Question\",\"name\":\"\u0110\u01a1n v\u1ecb c\u1ee7a nhi\u1ec7t dung ri\u00eang l\u00e0 g\u00ec?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"L\u00e0 J\/kg.K trong h\u1ec7 SI, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng J\/kg.\u00b0C.\"}},{\"@type\":\"Question\",\"name\":\"C\u00f4ng th\u1ee9c t\u00ednh nhi\u1ec7t l\u01b0\u1ee3ng l\u00e0 g\u00ec?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Q = m \u00b7 c \u00b7 \u0394t, trong \u0111\u00f3 m l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng (kg), c l\u00e0 nhi\u1ec7t dung ri\u00eang (J\/kg.K), \u0394t l\u00e0 \u0111\u1ed9 ch\u00eanh nhi\u1ec7t \u0111\u1ed9 (\u00b0C ho\u1eb7c K).\"}},{\"@type\":\"Question\",\"name\":\"Nhi\u1ec7t dung ri\u00eang c\u1ee7a n\u01b0\u1edbc l\u00e0 bao nhi\u00eau?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Kho\u1ea3ng 4.200 J\/kg.K, thu\u1ed9c nh\u00f3m cao nh\u1ea5t trong c\u00e1c ch\u1ea5t th\u00f4ng d\u1ee5ng.\"}},{\"@type\":\"Question\",\"name\":\"V\u00ec sao n\u01b0\u1edbc \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 l\u00e0m m\u00e1t?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"V\u00ec n\u01b0\u1edbc c\u00f3 nhi\u1ec7t dung ri\u00eang l\u1edbn, h\u1ea5p th\u1ee5 \u0111\u01b0\u1ee3c nhi\u1ec1u nhi\u1ec7t m\u00e0 nhi\u1ec7t \u0111\u1ed9 t\u0103ng ch\u1eadm, n\u00ean t\u1ea3n nhi\u1ec7t hi\u1ec7u qu\u1ea3 h\u01a1n ph\u1ea7n l\u1edbn ch\u1ea5t l\u1ecfng v\u00e0 kim lo\u1ea1i kh\u00e1c.\"}},{\"@type\":\"Question\",\"name\":\"Nhi\u1ec7t dung ri\u00eang v\u00e0 nhi\u1ec7t dung kh\u00e1c nhau ra sao?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Nhi\u1ec7t dung ri\u00eang (c) l\u00e0 h\u1eb1ng s\u1ed1 c\u1ee7a 1kg ch\u1ea5t; nhi\u1ec7t dung (C = m\u00b7c) l\u00e0 nhi\u1ec7t l\u01b0\u1ee3ng c\u1ea7n cho c\u1ea3 m\u1ed9t v\u1eadt c\u1ee5 th\u1ec3, ph\u1ee5 thu\u1ed9c kh\u1ed1i l\u01b0\u1ee3ng th\u1ef1c t\u1ebf.\"}},{\"@type\":\"Question\",\"name\":\"V\u00ec sao kim lo\u1ea1i n\u00f3ng l\u00ean v\u00e0 ngu\u1ed9i \u0111i nhanh h\u01a1n n\u01b0\u1edbc?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"V\u00ec kim lo\u1ea1i c\u00f3 nhi\u1ec7t dung ri\u00eang nh\u1ecf h\u01a1n n\u01b0\u1edbc nhi\u1ec1u l\u1ea7n, n\u00ean ch\u1ec9 c\u1ea7n \u00edt nhi\u1ec7t l\u01b0\u1ee3ng c\u0169ng \u0111\u1ee7 l\u00e0m nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i nhanh.\"}}]}\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nhi\u1ec7t dung ri\u00eang l\u00e0 nhi\u1ec7t l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u00e0m 1kg m\u1ed9t ch\u1ea5t t\u0103ng th\u00eam 1\u00b0C (hay 1K), k\u00fd hi\u1ec7u c, \u0111\u01a1n v\u1ecb J\/kg.K. N\u01b0\u1edbc c\u00f3 c \u2248 4.200 J\/kg.K \u2013 cao h\u01a1n h\u1eb3n kim lo\u1ea1i \u2013 n\u00ean v\u1eeba l\u00e2u n\u00f3ng v\u1eeba l\u00e2u ngu\u1ed9i, \u0111\u00f3 l\u00e0 l\u00fd do n\u01b0\u1edbc \u0111\u01b0\u1ee3c ch\u1ecdn l\u00e0m ch\u1ea5t t\u1ea3n nhi\u1ec7t. [&hellip;]<\/p>\n","protected":false},"author":65,"featured_media":567712,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"nhi\u1ec7t dung ri\u00eang","_yoast_wpseo_title":"Nhi\u1ec7t dung ri\u00eang l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c, v\u00ed d\u1ee5","_yoast_wpseo_metadesc":"Nhi\u1ec7t dung ri\u00eang l\u00e0 g\u00ec, c\u00f4ng th\u1ee9c Q = mc\u0394t t\u00ednh th\u1ebf n\u00e0o? B\u1ea3ng tra gi\u00e1 tr\u1ecb c\u00e1c ch\u1ea5t, v\u00ed d\u1ee5 c\u00f3 l\u1eddi gi\u1ea3i t\u1eebng b\u01b0\u1edbc v\u00e0 FAQ \u0111\u1ea7y \u0111\u1ee7, d\u1ec5 hi\u1ec3u nh\u1ea5t.","footnotes":""},"categories":[16],"tags":[],"class_list":["post-567244","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-thu-thuat"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Nhi\u1ec7t dung ri\u00eang l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c, v\u00ed d\u1ee5<\/title>\n<meta name=\"description\" content=\"Nhi\u1ec7t dung ri\u00eang l\u00e0 g\u00ec, c\u00f4ng th\u1ee9c Q = mc\u0394t t\u00ednh th\u1ebf n\u00e0o? B\u1ea3ng tra gi\u00e1 tr\u1ecb c\u00e1c ch\u1ea5t, v\u00ed d\u1ee5 c\u00f3 l\u1eddi gi\u1ea3i t\u1eebng b\u01b0\u1edbc v\u00e0 FAQ \u0111\u1ea7y \u0111\u1ee7, d\u1ec5 hi\u1ec3u nh\u1ea5t.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hoanghamobile.com\/tin-tuc\/nhiet-dung-rieng\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Nhi\u1ec7t dung ri\u00eang l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c Q = mc\u0394t v\u00e0 b\u1ea3ng tra\" \/>\n<meta property=\"og:description\" content=\"Nhi\u1ec7t dung ri\u00eang l\u00e0 g\u00ec, c\u00f4ng th\u1ee9c Q = mc\u0394t t\u00ednh th\u1ebf n\u00e0o? 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