{"id":1219,"date":"2021-10-09T00:54:53","date_gmt":"2021-10-09T00:54:53","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=1219"},"modified":"2021-10-14T22:12:02","modified_gmt":"2021-10-14T15:12:02","slug":"tim-hieu-ve-su-no-vi-nhiet-cua-chat-khi-giai-dap-kien-thuc-vat-ly-6","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/tim-hieu-ve-su-no-vi-nhiet-cua-chat-khi-giai-dap-kien-thuc-vat-ly-6\/","title":{"rendered":"T\u00ecm hi\u1ec3u v\u1ec1 s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed? Gi\u1ea3i \u0111\u00e1p ki\u1ebfn th\u1ee9c V\u1eadt l\u00fd 6"},"content":{"rendered":"\n<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n<p>C\u00e1c ch\u1ea5t \u0111\u1ec1u c\u00f3 s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t, t\u1eeb ch\u1ea5t r\u1eafn, cho \u0111\u1ebfn ch\u1ea5t l\u1ecfng, ch\u1ea5t kh\u00ed. Khi nhi\u1ec7t \u0111\u1ed9 c\u00f3 s\u1ef1 thay \u0111\u1ed5i, c\u00e1c ch\u1ea5t c\u0169ng bi\u1ebfn \u0111\u1ed5i v\u1ec1 m\u1eb7t th\u1ec3 t\u00edch. \u0110\u00e2y ch\u00ednh l\u00e0 l\u00fd do v\u00ec sao, c\u00e1c nh\u00e0 v\u1eadt l\u00fd h\u1ecdc \u0111\u00e3 nghi\u00ean c\u1ee9u v\u00e0 \u0111em \u0111\u1ebfn cho ch\u00fang ta tri th\u1ee9c m\u1edbi. Nh\u1eefng tri th\u1ee9c n\u00e0y \u0111em l\u1ea1i \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n v\u00e0 gi\u1ea3i th\u00edch c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng trong cu\u1ed9c s\u1ed1ng. S\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed s\u1ebd \u0111\u01b0\u1ee3c ch\u00fang t\u00f4i gi\u1ea3i \u0111\u00e1p trong b\u00e0i vi\u1ebft ng\u00e0y h\u00f4m nay. C\u00e1c em h\u00e3y c\u00f9ng ch\u00fang t\u00f4i t\u00ecm hi\u1ec3u v\u00e0 h\u1ecdc h\u1ecfi nh\u1eefng v\u00ed d\u1ee5 th\u1ef1c ti\u1ec5n nh\u00e9!<\/p>\n\n\n\n<p>S\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed l\u00e0 g\u00ec?<\/p>\n\n\n\n<p>C\u0169ng gi\u1ed1ng nh\u01b0 ch\u1ea5t l\u1ecfng v\u00e0 ch\u1ea5t r\u1eafn, ch\u1ea5t kh\u00ed c\u0169ng c\u00f3 s\u1ef1 gi\u00e3n n\u1edf khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng gi\u1ea3m. L\u00fd thuy\u1ebft n\u00f3i v\u1ec1 s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed c\u00f3 ph\u1ea7n t\u01b0\u01a1ng t\u1ef1 hai ch\u1ea5t c\u00f2n l\u1ea1i. Tuy nhi\u00ean, ch\u00fang t\u00f4i v\u1eabn s\u1ebd \u0111\u1ec1 c\u1eadp v\u00e0 gi\u1ea3i th\u00edch \u0111\u1ea7y \u0111\u1ee7. C\u00e1c em n\u00ean ghi ch\u00e9p l\u1ea1i \u0111\u1ec3 ph\u00e2n bi\u1ec7t v\u00e0 <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc t\u1eadp<\/a>.<\/p>\n\n\n\n<p>C\u00e1c ch\u1ea5t kh\u00ed \u0111\u1ec1u n\u1edf ra khi n\u00f3ng l\u00ean v\u00e0 co l\u1ea1i khi l\u1ea1nh \u0111i.<\/p>\n\n\n\n<p>Khi nhi\u1ec7t \u0111\u1ed9 ti\u1ebfp x\u00fac v\u1edbi ch\u1ea5t kh\u00ed t\u0103ng l\u00ean. D\u1eabn \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 c\u1ee7a ch\u1ea5t kh\u00ed c\u0169ng t\u0103ng l\u00ean. L\u00fac n\u00e0y ch\u1ea5t kh\u00ed s\u1ebd c\u00f3 s\u1ef1 gi\u00e3n ra. Hay n\u00f3i c\u00e1ch kh\u00e1c, th\u1ec3 t\u00edch c\u1ee7a ch\u1ea5t kh\u00ed gi\u00e3n ra khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng l\u00ean. Tr\u00e1i l\u1ea1i, khi nhi\u1ec7t \u0111\u1ed9 c\u1ee7a ch\u1ea5t khi \u0111ang cao, d\u1ea7n d\u1ea7n h\u1ea1 xu\u1ed1ng. Ph\u1ea7n th\u1ec3 t\u00edch c\u1ee7a ch\u1ea5t kh\u00ed l\u00fac n\u00e0y c\u0169ng gi\u1ea3m \u0111i. T\u00f9y theo nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m \u0111i l\u00e0 bao nhi\u00eau, ch\u1ea5t kh\u00ed c\u00f3 s\u1ef1 bi\u1ebfn \u0111\u1ed5i kh\u00e1c bi\u1ec7t.<\/p>\n\n\n\n<p>S\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a kh\u00f4ng kh\u00ed<\/p>\n\n\n\n<p>Ri\u00eang \u0111\u1ed1i v\u1edbi th\u00ed nghi\u1ec7m s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed, c\u00e1c em c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng th\u1ef1c hi\u1ec7n t\u1ea1i l\u1edbp. C\u00e1c em c\u00f3 th\u1ec3 tham kh\u1ea3o chu\u1ea9n b\u1ecb th\u00ed nghi\u1ec7m theo s\u00e1ch gi\u00e1o khoa \u0111\u1ec3 th\u1ef1c hi\u1ec7n. C\u00e1c th\u1ea7y c\u00f4 s\u1ebd ch\u1ec9 d\u1eabn cho c\u00e1c e v\u00e0 chu\u1ea9n b\u1ecb d\u1ee5ng c\u1ee5 th\u00ed nghi\u1ec7m \u0111\u1ec3 th\u1ea5y k\u1ebft qu\u1ea3 r\u00f5 nh\u1ea5t.<\/p>\n\n\n\n<p>\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf<\/p>\n\n\n\n<p>Ngo\u00e0i ra, trong th\u1ef1c t\u1ebf, c\u00e1c em c\u0169ng c\u00f3 th\u1ec3 th\u1ea5y \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng. Khi c\u00e1c em \u0111un n\u01b0\u1edbc s\u00f4i v\u00e0 n\u01b0\u1edbc chuy\u1ec3n th\u00e0nh th\u1ec3 kh\u00ed. \u0110\u00f4i khi ph\u1ea7n n\u1eafp c\u1ee7a xoong, hay n\u1ed3i \u0111un c\u00f3 th\u1ec3 b\u1ecb kh\u00ed \u0111\u1ea9y l\u00ean. \u0110\u00e2y ch\u00ednh l\u00e0 s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng l\u00ean cao. V\u1edbi hi\u1ec7n t\u01b0\u1ee3ng th\u1ef1c t\u1ebf n\u00e0y, c\u00e1c em c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng nh\u00ecn th\u1ea5y. S\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a kh\u00ed v\u1eabn l\u00e0 s\u1ef1 n\u1edf kh\u1ed1i. C\u00e1c em kh\u00f4ng c\u1ea7n quan t\u00e2m qu\u00e1 nhi\u1ec1u m\u00e0 ch\u1ec9 c\u1ea7n \u00e1p d\u1ee5ng \u0111\u00fang l\u00fd thuy\u1ebft.<\/p>\n\n\n\n<p>\u0110\u1eb7c \u0111i\u1ec3m s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed<\/p>\n\n\n\n<p>\u0110\u1eb7c \u0111i\u1ec3m s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed kh\u00e1c v\u1edbi ch\u1ea5t r\u1eafn hay l\u1ecfng. N\u1ebfu nh\u01b0 \u1edf hay ch\u1ea5t r\u1eafn v\u00e0 l\u1ecfng, s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a c\u00e1c ch\u1ea5t kh\u00e1c nhau l\u00e0 kh\u00e1c nhau. Th\u00ec \u0111\u1ebfn v\u1edbi ch\u1ea5t kh\u00ed, m\u1ecdi ch\u1ea5t kh\u00ed \u0111\u1ec1u c\u00f3 s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t gi\u1ed1ng nhau. Ch\u1ea5t kh\u00ed c\u00f3 s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t l\u1edbn h\u01a1n h\u1eb3n so v\u1edbi ch\u1ea5t r\u1eafn, ch\u1ea5t l\u1ecfng. \u0110\u00f3 c\u0169ng ch\u00ednh l\u00e0 l\u00fd do v\u00ec sao, ch\u00fang ta c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng quan s\u00e1t hi\u1ec7n t\u01b0\u1ee3ng.<\/p>\n\n\n\n<p>C\u00e1c ch\u1ea5t kh\u00ed kh\u00e1c nhau n\u1edf v\u00ec nhi\u1ec7t gi\u1ed1ng nhau<\/p>\n\n\n\n<p>B\u00ean c\u1ea1nh \u0111\u00f3, c\u00e1c em c\u0169ng c\u1ea7n nh\u1edb \u0111\u1ebfn m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m ri\u00eang bi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed. \u0110\u00f3 ch\u00ednh l\u00e0, ch\u1ea5t kh\u00ed c\u00f3 t\u00ednh ch\u1ea5t n\u00e9n. Th\u1ec3 t\u00edch c\u1ee7a ch\u1ea5t kh\u00ed c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c n\u00e9n ch\u1eb7t v\u00e0 chi\u1ebfm h\u1ebft th\u1ec3 t\u00edch c\u1ee7a b\u00ecnh ch\u1ee9a.<\/p>\n\n\n\n<p>V\u00ed d\u1ee5 th\u1ef1c t\u1ebf s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed<\/p>\n\n\n\n<p>C\u00e1c em n\u00ean ghi nh\u1edb m\u1ed9t s\u1ed1 v\u00ed d\u1ee5 th\u1ef1c t\u1ebf c\u1ee7a s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed. Nh\u1eefng \u0111i\u1ec1u ch\u00fang ta th\u01b0\u1eddng th\u1ea5y nh\u01b0 khinh kh\u00ed c\u1ea7u. Kh\u00ed c\u1ea7u d\u00f9ng kh\u00f4ng kh\u00ed n\u00f3ng \u0111\u1ec3 ch\u1edf ng\u01b0\u1eddi ho\u1eb7c v\u1eadt bay l\u00ean cao. Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a khinh kh\u00ed c\u1ea7u ch\u00ednh l\u00e0 nh\u1edd v\u00e0o s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed. \u0110\u00e8n tr\u1eddi hay \u0111\u01b0\u1ee3c th\u1ea3 trong c\u00e1c m\u00f9a l\u1ec5 h\u1ed9i, c\u0169ng l\u00e0 m\u1ed9t d\u1ea1ng bi\u1ebfn chuy\u1ec3n c\u1ee7a kh\u00ed c\u1ea7u. \u0110\u00e8n tr\u1eddi c\u0169ng t\u1eadn d\u1ee5ng s\u1ee9c n\u00f3ng l\u00e0m kh\u00ed b\u00ean trong n\u00f3ng l\u00ean. T\u1eeb \u0111\u00f3 gi\u00fap \u0111\u00e8n tr\u1eddi tr\u1edf n\u00ean nh\u1eb9 h\u01a1n v\u00e0 c\u00f3 th\u1ec3 bay l\u00ean trong kh\u00f4ng kh\u00ed.<\/p>\n\n\n\n<p>\u1ee8ng d\u1ee5ng s\u1eed n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed<\/p>\n\n\n\n<p>Trong khoa h\u1ecdc, khinh kh\u00ed c\u1ea7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 nghi\u00ean c\u1ee9u kh\u00ed quy\u1ec3n. Ngo\u00e0i ra, c\u00e1c nh\u00e0 khoa h\u1ecdc c\u00f2n s\u1eed d\u1ee5ng khinh kh\u00ed c\u1ea7u \u0111\u1ec3 quan s\u00e1t thi\u00ean v\u0103n. \u1ee8ng d\u1ee5ng c\u1ee7a s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed th\u1eadt s\u1ef1 \u0111em \u0111\u1ebfn r\u1ea5t nhi\u1ec1u \u0111i\u1ec1u t\u1ed1t. C\u00e1c em n\u00ean ghi ch\u00fa l\u1ea1i nh\u1eefng \u1ee9ng d\u1ee5ng n\u00e0y \u0111\u1ec3 l\u1ea5y v\u00ed d\u1ee5 cho b\u00e0i h\u1ecdc. Ngo\u00e0i ra, c\u00e1c em c\u0169ng c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a khinh kh\u00ed c\u1ea7u \u0111\u1ec3 m\u1edf mang tr\u00ed th\u1ee9c. C\u00f3 r\u1ea5t nhi\u1ec1u nh\u1eefng hi\u1ec7n t\u01b0\u1ee3ng trong cu\u1ed9c s\u1ed1ng li\u00ean quan \u0111\u1ebfn v\u1eadt l\u00fd.<\/p>\n\n\n\n<p>Th\u00ed nghi\u1ec7m s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed<\/p>\n\n\n\n<p>C\u00e1c em c\u00f3 th\u1ec3 tham kh\u1ea3o th\u00ed nghi\u1ec7m n\u00e0y \u0111\u1ec3 c\u00f3 th\u1ec3 t\u1ef1 ch\u1ee9ng minh \u0111\u1ecbnh l\u00fd. Th\u00ed nghi\u1ec7m n\u00e0y v\u00f4 c\u00f9ng d\u1ec5 d\u00e0ng, ai c\u0169ng c\u00f3 th\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c. C\u00e1c em h\u00e3y chu\u1ea9n b\u1ecb theo c\u00e1c b\u01b0\u1edbc sau \u0111\u00e2y nh\u00e9!<\/p>\n\n\n\n<p>C\u1eafm m\u1ed9t \u1ed1ng th\u1ee7y tinh nh\u1ecf xuy\u00ean qua n\u00fat b\u00ecnh c\u1ea7u.<\/p>\n\n\n\n<p>Cho m\u1ed9t gi\u1ecdt n\u01b0\u1edbc m\u00e0u v\u00e0o trong \u1ed1ng th\u1ee7y tinh. Sao cho gi\u1ecdt n\u01b0\u1edbc nh\u1ecf n\u00e0y gi\u1eef \u0111\u01b0\u1ee3c v\u1ecb tr\u00ed \u1edf gi\u1eefa \u1ed1ng th\u1ee7y tinh. Gi\u1ecdt n\u01b0\u1edbc kh\u00f4ng b\u1ecb ch\u1ea3y xu\u1ed1ng ph\u00eda d\u01b0\u1edbi.<\/p>\n\n\n\n<p>L\u1eafp ch\u1eb7t n\u00fat cao su c\u00f3 \u1ed1ng th\u1ee7y tinh ch\u1ee9a n\u01b0\u1edbc m\u00e0u v\u00e0o b\u00ecnh c\u1ea7u \u0111\u00e3 chu\u1ea9n b\u1ecb.<\/p>\n\n\n\n<p>X\u00e1t hai l\u00f2ng b\u00e0n tay v\u00e0o nhau cho n\u00f3ng l\u00ean, sau \u0111\u00f3 \u00e1p ch\u1eb7t v\u00e0o b\u1ec1 m\u1eb7t b\u00ean ngo\u00e0i b\u00ecnh c\u1ea7u.<\/p>\n\n\n\n<p>Hi\u1ec7n t\u01b0\u1ee3ng: Gi\u1ecdt n\u01b0\u1edbc m\u00e0u \u0111i l\u00ean, ch\u1ee9ng t\u1ecf th\u1ec3 t\u00edch kh\u00ed t\u0103ng, kh\u00ed trong b\u00ecnh n\u1edf ra.<\/p>\n\n\n\n<p>Th\u1eed kh\u00f4ng \u00e1p tay v\u00e0o b\u00ecnh c\u1ea7u, gi\u1ecdt n\u01b0\u1edbc m\u00e0u \u0111i xu\u1ed1ng, ch\u1ee9ng t\u1ecf th\u1ec3 t\u00edch kh\u00ed gi\u1ea3m, kh\u00ed trong b\u00ecnh co l\u1ea1i.<\/p>\n\n\n\n<p>Th\u00ed nghi\u1ec7m s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed<\/p>\n\n\n\n<p>D\u1ef1a v\u00e0o th\u00ed nghi\u1ec7m \u0111\u01a1n gi\u1ea3n ph\u00eda tr\u00ean \u0111\u00e2y, c\u00e1c em c\u00f3 th\u1ec3 th\u1ea5y r\u00f5 \u0111\u01b0\u1ee3c s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed. Th\u00ed nghi\u1ec7m n\u00e0y c\u00f3 th\u1ec3 c\u00e1c em s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean l\u1edbp. Quan s\u00e1t k\u1ebft qu\u1ea3 v\u00e0 ghi ch\u00e9p l\u1ea1i \u0111\u1ec3 ch\u1eafc ch\u1eafn r\u1eb1ng m\u00ecnh l\u00e0m \u0111\u00fang nh\u00e9!<\/p>\n\n\n\n<p>C\u00e1c d\u1ea1ng b\u00e0i t\u1eadp<\/p>\n\n\n\n<p>C\u00f3 hai d\u1ea1ng b\u00e0i t\u1eadp c\u01a1 b\u1ea3n cho ch\u1ee7 \u0111\u1ec1 s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed. V\u1edbi t\u1eebng d\u1ea1ng b\u00e0i, c\u00e1c em s\u1ebd c\u00f3 c\u00e1ch l\u00e0m kh\u00e1c nhau. Ch\u00fang t\u00f4i \u0111\u00e3 t\u00ecm hi\u1ec3u v\u00e0 \u0111\u1ec1 c\u1eadp ph\u00eda d\u01b0\u1edbi \u0111\u00e2y. C\u00e1c em h\u00e3y tham kh\u1ea3o nh\u00e9!<\/p>\n\n\n\n<p>D\u1ea1ng b\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m<\/p>\n\n\n\n<p>V\u1edbi d\u1ea1ng b\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m, h\u1ea7u h\u1ebft c\u00e1c c\u00e2u h\u1ecfi s\u1ebd xoay quanh l\u00fd thuy\u1ebft. \u0110\u00f4i khi s\u1ebd l\u00e0 s\u1ef1 t\u00ednh to\u00e1n \u0111\u01a1n gi\u1ea3n. C\u00e1c em c\u1ea7n ph\u1ea3i nh\u1edb r\u00f5 v\u1ec1 l\u00fd thuy\u1ebft \u0111\u1ec3 ch\u1ecdn \u0111\u01b0\u1ee3c \u0111\u00e1p \u00e1n ch\u00ednh x\u00e1c nh\u1ea5t.<\/p>\n\n\n\n<p>B\u00e0i 1: Ch\u1ecdn c\u00e2u ph\u00e1t bi\u1ec3u sai<\/p>\n\n\n\n<p>Ch\u1ea5t l\u1ecfng co l\u1ea1i khi l\u1ea1nh \u0111i.<\/p>\n\n\n\n<p>\u0110\u1ed9 d\u00e3n n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a c\u00e1c ch\u1ea5t l\u1ecfng kh\u00e1c nhau l\u00e0 nh\u01b0 nhau.<\/p>\n\n\n\n<p>Khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i th\u00ec th\u1ec3 t\u00edch ch\u1ea5t l\u1ecfng thay \u0111\u1ed5i.<\/p>\n\n\n\n<p>Ch\u1ea5t l\u1ecfng n\u1edf ra khi n\u00f3ng l\u00ean.<\/p>\n\n\n\n<p>Gi\u1ea3i \u0111\u00e1p: \u0110\u1ed9 d\u00e3n n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a c\u00e1c ch\u1ea5t l\u1ecfng kh\u00e1c nhau l\u00e0 kh\u00e1c nhau.<\/p>\n\n\n\n<p>\u21d2 \u0110\u00e1p \u00e1n B<\/p>\n\n\n\n<p>B\u00e0i 2: L\u00e0m l\u1ea1nh m\u1ed9t l\u01b0\u1ee3ng n\u01b0\u1edbc t\u1eeb 100oC v\u1ec1 50oC. Kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng ri\u00eang c\u1ee7a n\u01b0\u1edbc thay \u0111\u1ed5i nh\u01b0 th\u1ebf n\u00e0o?<\/p>\n\n\n\n<p>C\u1ea3 kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng ri\u00eang \u0111\u1ec1u t\u0103ng.<\/p>\n\n\n\n<p>Ban \u0111\u1ea7u kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng ri\u00eang gi\u1ea3m sau \u0111\u00f3 b\u1eaft \u0111\u1ea7u t\u0103ng.<\/p>\n\n\n\n<p>C\u1ea3 kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng ri\u00eang \u0111\u1ec1u gi\u1ea3m.<\/p>\n\n\n\n<p>C\u1ea3 kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng ri\u00eang \u0111\u1ec1u kh\u00f4ng \u0111\u1ed5i.<\/p>\n\n\n\n<p>Khi gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 th\u00ec m kh\u00f4ng thay \u0111\u1ed5i, c\u00f2n V gi\u1ea3m.<\/p>\n\n\n\n<p>\u21d2 \u0110\u00e1p \u00e1n A<\/p>\n\n\n\n<p>B\u00e0i t\u1eadp v\u1eadt l\u00fd 6<\/p>\n\n\n\n<p>B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m kh\u00f3<\/p>\n\n\n\n<p>B\u00e0i 3: \u0110un n\u00f3ng m\u1ed9t l\u01b0\u1ee3ng n\u01b0\u1edbc \u0111\u00e1 t\u1eeb 0oC \u0111\u1ebfn 100oC. Kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 th\u1ec3 t\u00edch l\u01b0\u1ee3ng n\u01b0\u1edbc \u0111\u00f3 thay \u0111\u1ed5i nh\u01b0 th\u1ebf n\u00e0o?<\/p>\n\n\n\n<p>Kh\u1ed1i l\u01b0\u1ee3ng kh\u00f4ng \u0111\u1ed5i, ban \u0111\u1ea7u th\u1ec3 t\u00edch gi\u1ea3m sau \u0111\u00f3 t\u0103ng<\/p>\n\n\n\n<p>Kh\u1ed1i l\u01b0\u1ee3ng kh\u00f4ng \u0111\u1ed5i, th\u1ec3 t\u00edch gi\u1ea3m.<\/p>\n\n\n\n<p>Kh\u1ed1i l\u01b0\u1ee3ng t\u0103ng, th\u1ec3 t\u00edch gi\u1ea3m.<\/p>\n\n\n\n<p>Kh\u1ed1i l\u01b0\u1ee3ng t\u0103ng, th\u1ec3 t\u00edch kh\u00f4ng \u0111\u1ed5i.<\/p>\n\n\n\n<p>Gi\u1ea3i \u0111\u00e1p:<\/p>\n\n\n\n<p>Kh\u1ed1i l\u01b0\u1ee3ng kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec7t \u0111\u1ed9.<\/p>\n\n\n\n<p>V\u1edbi n\u01b0\u1edbc, t\u1ea1i nhi\u1ec7t \u0111\u1ed9 4oC n\u01b0\u1edbc c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang l\u1edbn nh\u1ea5t \u2192 th\u1ec3 t\u00edch nh\u1ecf nh\u1ea5t. Do \u0111\u00f3, khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng t\u1eeb 0oC \u0111\u1ebfn 4oC th\u1ec3 t\u00edch gi\u1ea3m d\u1ea7n, khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng t\u1eeb 4oC \u0111\u1ebfn 100oC th\u1ec3 t\u00edch t\u0103ng d\u1ea7n.<\/p>\n\n\n\n<p>\u21d2 \u0110\u00e1p \u00e1n A.<\/p>\n\n\n\n<p>B\u00e0i 4: Ch\u1ecdn c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang. C\u00f3 hai b\u00ecnh gi\u1ed1ng h\u1ec7t nhau ch\u1ee9a \u0111\u1ea7y ch\u1ea5t l\u1ecfng. M\u1ed9t b\u00ecnh ch\u1ee9a r\u01b0\u1ee3u v\u00e0 b\u00ecnh c\u00f2n l\u1ea1i ch\u1ee9a n\u01b0\u1edbc. Khi \u0111un n\u00f3ng c\u1ea3 hai b\u00ecnh \u1edf c\u00f9ng m\u1ed9t nhi\u1ec7t \u0111\u1ed9 nh\u01b0 nhau, h\u1ecfi l\u01b0\u1ee3ng r\u01b0\u1ee3u hay n\u01b0\u1edbc tr\u00e0o ra kh\u1ecfi b\u00ecnh nhi\u1ec1u h\u01a1n? Bi\u1ebft r\u1eb1ng r\u01b0\u1ee3u n\u1edf v\u00ec nhi\u1ec7t l\u1edbn h\u01a1n n\u01b0\u1edbc.<\/p>\n\n\n\n<p>N\u01b0\u1edbc tr\u00e0o ra nhi\u1ec1u h\u01a1n r\u01b0\u1ee3u<\/p>\n\n\n\n<p>N\u01b0\u1edbc v\u00e0 r\u01b0\u1ee3u tr\u00e0o ra nh\u01b0 nhau<\/p>\n\n\n\n<p>R\u01b0\u1ee3u tr\u00e0o ra nhi\u1ec1u h\u01a1n n\u01b0\u1edbc<\/p>\n\n\n\n<p>Kh\u00f4ng \u0111\u1ee7 c\u01a1 s\u1edf \u0111\u1ec3 k\u1ebft lu\u1eadn<\/p>\n\n\n\n<p>Gi\u1ea3i \u0111\u00e1p: Khi \u0111un n\u00f3ng c\u1ea3 hai b\u00ecnh \u1edf c\u00f9ng m\u1ed9t nhi\u1ec7t \u0111\u1ed9 nh\u01b0 nhau, l\u01b0\u1ee3ng r\u01b0\u1ee3u tr\u00e0o ra kh\u1ecfi b\u00ecnh nhi\u1ec1u h\u01a1n l\u01b0\u1ee3ng n\u01b0\u1edbc v\u00ec r\u01b0\u1ee3u n\u1edf nhi\u1ec1u v\u00ec nhi\u1ec7t h\u01a1n n\u01b0\u1edbc.<\/p>\n\n\n\n<p>\u21d2 \u0110\u00e1p \u00e1n C<\/p>\n\n\n\n<p>D\u1ea1ng b\u00e0i t\u1eadp li\u00ean h\u1ec7 th\u1ef1c ti\u1ec5n<\/p>\n\n\n\n<p>V\u1edbi d\u1ea1ng b\u00e0i t\u1eadp li\u00ean h\u1ec7, h\u1ea7u h\u1ebft \u0111\u1ec1u s\u1ebd l\u00e0 c\u00e2u h\u1ecfi \u00e1p d\u1ee5ng th\u1ef1c t\u1ebf. C\u00e1c em ch\u1ec9 c\u1ea7n nh\u1edb l\u00fd thuy\u1ebft k\u1ebft h\u1ee3p v\u1edbi v\u00ed d\u1ee5 th\u1ef1c t\u1ebf l\u00e0 c\u00f3 th\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c b\u00e0i. C\u00e1c b\u01b0\u1edbc th\u1ef1c hi\u1ec7n th\u00ed nghi\u1ec7m c\u0169ng kh\u00e1 quan tr\u1ecdng. C\u00e1c em h\u00e3y c\u1ed1 g\u1eafng h\u1ecdc thu\u1ed9c \u0111\u1ec3 d\u00e0nh \u0111i\u1ec3m t\u1ed1t \u0111a nh\u00e9!<\/p>\n\n\n\n<p>C\u00f3 th\u1ec3 n\u00f3i, t\u1ea5t c\u1ea3 nh\u1eefng ki\u1ebfn th\u1ee9c v\u1ec1 s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a ch\u1ea5t kh\u00ed \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u00fang t\u00f4i \u0111\u1ec1 c\u1eadp tr\u00ean \u0111\u00e2y. Hy v\u1ecdng nh\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y c\u00f3 th\u1ec3 gi\u00fap c\u00e1c em h\u1ecdc t\u1ed1<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn C\u00e1c ch\u1ea5t \u0111\u1ec1u c\u00f3 s\u1ef1 n\u1edf v\u00ec nhi\u1ec7t, t\u1eeb ch\u1ea5t r\u1eafn, cho \u0111\u1ebfn ch\u1ea5t l\u1ecfng, ch\u1ea5t kh\u00ed. Khi nhi\u1ec7t \u0111\u1ed9 c\u00f3 s\u1ef1 thay \u0111\u1ed5i, c\u00e1c ch\u1ea5t c\u0169ng bi\u1ebfn \u0111\u1ed5i v\u1ec1 m\u1eb7t th\u1ec3 t\u00edch. \u0110\u00e2y ch\u00ednh l\u00e0 l\u00fd do v\u00ec sao, c\u00e1c nh\u00e0 v\u1eadt l\u00fd h\u1ecdc \u0111\u00e3 nghi\u00ean c\u1ee9u v\u00e0 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[4,7],"tags":[],"class_list":["post-1219","post","type-post","status-publish","format-standard","hentry","category-trung-hoc","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1219","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=1219"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1219\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=1219"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=1219"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=1219"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}