T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 1 – Arkady Leokum<\/p>\n\n\n\n
Khi c\u00e1c nh\u00e0 khoa h\u1ecdc t\u1ef1 h\u1ecfi tr\u00ean c\u00e1c h\u00e0nh tinh kh\u00e1c c\u00f3 s\u1ef1 s\u1ed1ng kh\u00f4ng th\u00ec h\u1ecd c\u0169ng \u0111\u1eb7t c\u00e2u h\u1ecfi: tr\u00ean \u0111\u00f3 c\u00f3 n\u01b0\u1edbc kh\u00f4ng? \u0111\u1eddi s\u1ed1ng, nh\u01b0 ta \u0111\u00e3 bi\u1ebft, kh\u00f4ng th\u1ec3 thi\u1ebfu n\u01b0\u1edbc.<\/p>\n\n\n\n
N\u01b0\u1edbc – t\u1ea5t nhi\u00ean l\u00e0 n\u01b0\u1edbc nguy\u00ean ch\u1ea5t – kh\u00f4ng m\u00f9i, kh\u00f4ng v\u1ecb, kh\u00f4ng m\u00e0u s\u1eafc, l\u00e0 th\u00e0nh ph\u1ea7n quan tr\u1ecdng trong m\u1ecdi sinh v\u1eadt k\u1ec3 c\u1ea3 th\u1ea3o m\u1ed9c. N\u01b0\u1edbc c\u00f3 trong \u0111\u1ea5t, trong kh\u00f4ng kh\u00ed. Sinh v\u1eadt, k\u1ec3 c\u1ea3 th\u1ef1c v\u1eadt, ch\u1ec9 c\u00f3 th\u1ec3 ti\u00eau h\u00f3a, \u0111\u1ed3ng h\u00f3a th\u1ef1c ph\u1ea9m khi th\u1ef1c ph\u1ea9m n\u00e0y \u0111\u01b0\u1ee3c h\u00f2a tan trong n\u01b0\u1edbc. M\u00f4 s\u1ed1ng c\u0169ng ch\u1ee9a ch\u1ee7 y\u1ebfu l\u00e0 n\u01b0\u1edbc. V\u1eady th\u00ec n\u01b0\u1edbc \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o b\u1eb1ng nh\u1eefng ch\u1ea5t (nguy\u00ean t\u1ed1) n\u00e0o? \u0111\u00f3 ch\u1ec9 l\u00e0 m\u1ed9t h\u1ee3p ch\u1ea5t \u0111\u01a1n gi\u1ea3n bao g\u1ed3m hai th\u1ee9 kh\u00ed: hydro, m\u1ed9t lo\u1ea1i kh\u00ed r\u1ea5t nh\u1eb9 v\u00e0 kh\u00ed oxy n\u1eb7ng h\u01a1n, m\u1ed9t th\u1ee9 kh\u00ed c\u00f3 ho\u1ea1t t\u00ednh cao.<\/p>\n\n\n\n
N\u01b0\u1edbc \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh khi kh\u00ed hydro b\u1ecb \u201c\u0111\u1ed1t ch\u00e1y\u201d trong kh\u00ed oxy. Nh\u01b0ng n\u01b0\u1edbc kh\u00f4ng gi\u1ed1ng v\u1edbi m\u1ed9t nguy\u00ean t\u1ed1 n\u00e0o trong s\u1ed1 hai nguy\u00ean t\u1ed1 \u0111\u00e3 t\u1ea1o ra n\u00f3. N\u01b0\u1edbc c\u00f3 \u0111\u1eb7c t\u00ednh ri\u00eang c\u1ee7a n\u01b0\u1edbc. C\u0169ng gi\u1ed1ng nh\u01b0 c\u00e1c v\u1eadt ch\u1ea5t kh\u00e1c, n\u01b0\u1edbc c\u00f3 ba tr\u1ea1ng th\u00e1i: l\u1ecfng (tr\u1ea1ng th\u00e1i ph\u1ed5 bi\u1ebfn), \u0111\u00f4ng \u0111\u1eb7c (g\u1ecdi l\u00e0 n\u01b0\u1edbc \u0111\u00e1) v\u00e0 h\u01a1i (g\u1ecdi l\u00e0 \u201ch\u01a1i n\u01b0\u1edbc\u201d). N\u01b0\u1edbc \u1edf tr\u1ea1ng th\u00e1i n\u00e0o l\u00e0 do nhi\u1ec7t \u0111\u1ed9.<\/p>\n\n\n\n
\u1ede nhi\u1ec7t \u0111\u1ed9 00C – hay 320F – n\u01b0\u1edbc chuy\u1ec3n t\u1eeb th\u1ec3 l\u1ecfng sang th\u1ec3 \u0111\u00f4ng \u0111\u1eb7c. \u1ede 1000C hay 2120F – n\u01b0\u1edbc chuy\u1ec3n sang th\u1ec3 h\u01a1i g\u1ecdi l\u00e0 s\u1ef1 b\u1ed1c h\u01a1i. N\u1ebfu b\u1ecf c\u1ee5c \u0111\u00e1 v\u00e0o c\u00e1i ly \u0111\u1eb7t \u1edf n\u01a1i \u1ea5m, n\u01b0\u1edbc \u0111\u00e1 b\u1eaft \u0111\u1ea7u h\u00f3a l\u1ecfng, ta g\u1ecdi l\u00e0 tan ch\u1ea3y. N\u1ebfu \u0111un n\u01b0\u1edbc do n\u01b0\u1edbc \u0111\u00e1 ch\u1ea3y ra, ta th\u1ea5y n\u01b0\u1edbc \u0111\u00f3 b\u1ed1c h\u01a1i (\u1edf 1000C). Ng\u01b0\u1ee3c l\u1ea1i l\u00e0m l\u1ea1nh h\u01a1i n\u01b0\u1edbc, ta \u0111\u01b0\u1ee3c n\u01b0\u1edbc. Ti\u1ebfp t\u1ee5c l\u00e0m l\u1ea1nh ta \u0111\u01b0\u1ee3c n\u01b0\u1edbc \u0111\u00e1.<\/p>\n\n\n\n
Trong thi\u00ean nhi\u00ean kh\u00f4ng bao gi\u1edd c\u00f3 d\u1ea1ng n\u01b0\u1edbc nguy\u00ean ch\u1ea5t. N\u01b0\u1edbc trong thi\u00ean nhi\u00ean l\u00e0 m\u1ed9t h\u1ee3p ch\u1ea5t trong \u0111\u00f3 c\u00f3 c\u00e1c ch\u1ea5t kho\u00e1ng, c\u00e1c ch\u1ea5t kh\u00ed kh\u00e1c v\u00e0 c\u00e1c sinh v\u1eadt li ti.<\/p>\n","protected":false},"excerpt":{"rendered":"
T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 1 – Arkady Leokum Khi c\u00e1c nh\u00e0 khoa h\u1ecdc t\u1ef1 h\u1ecfi tr\u00ean c\u00e1c h\u00e0nh tinh kh\u00e1c c\u00f3 s\u1ef1 s\u1ed1ng kh\u00f4ng th\u00ec h\u1ecd c\u0169ng \u0111\u1eb7t c\u00e2u h\u1ecfi: tr\u00ean \u0111\u00f3 c\u00f3 n\u01b0\u1edbc kh\u00f4ng? \u0111\u1eddi s\u1ed1ng, nh\u01b0 ta \u0111\u00e3 bi\u1ebft, kh\u00f4ng th\u1ec3 thi\u1ebfu n\u01b0\u1edbc. N\u01b0\u1edbc – […]<\/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":[15],"tags":[],"class_list":["post-13549","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13549","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=13549"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13549\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=13549"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=13549"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=13549"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}