作者tbuabsas (为诚不破)
看板TransBioChem
标题Re: [化学]求沸点~
时间Fri Jun 20 03:35:45 2008
※ 引述《chat543 (小ㄐ)》之铭言：
: at what temperature is the following process spontaneous at 1atm
: Br(l)→Br(g)
题目是不是应该改成: Br2(l)→Br2(g)
: -1 -1
: where ΔH=31.0 KJ/mol and ΔS=93.0 JK / mol
: what is the normal boiling point of liquid Br2 ?
spontaneous => ΔG < 0
=> ΔG = ΔH-TΔS <0
-1 -1
=> T > ΔH/ΔS = 31000 (J/mol) / 93.0 ( JK / mol )
=> T > 333 K
at boiling point ΔG = 0 =ΔH-TΔS
=> T = 333 K
--
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 140.112.243.174
※ 编辑: tbuabsas 来自: 140.112.243.174 (06/20 03:38)
1F：推 chat543:题目打错了^^"~~谢谢帮解!! 06/20 12:14