作者ohmygod0715 (Thomas)
看板ChemEng
标题[问题] 热力学一题观念题
时间Wed Mar 5 15:44:02 2014
http://ppt.cc/SxuE
1.which of the following gives rise to temperature?
(1)change of internal energy with respect to voiume at constant entropy.
(2)change of Helmholtz free energy with respect to entropy at constant P(压力)
(3)change of Gibbs free energy with respect to entropy at constant pressure.
(4)change of enthalpy with respect to entropy at constant pressure.
(我没答案)
dU=TdS-PdV
dA=-SdT-PdV
dG=-SdT+VdP
dH=TdS+VdP
(1)定熵，dU=-PdV 温度上升 体积不会变吗@@?
(2)定容，dA=-SdT 温度上升 A的也会改变吧@@?
(3)定压，dG=-SdT 温度上升 G也会改变吧
(4)定压，dH=TdS 温度上升 H也会改变吧= 口=
是用以上式子来判断的吗?
好像每一题都有关系阿@_@
求解<(_ _)>
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◆ From: 112.104.102.252
※ 编辑: ohmygod0715 来自: 112.104.102.252 (03/05 17:53)
1F：推 lucifer19:其实我不是很确定这题的题意说 140.120.135.23 03/05 18:14
2F：→ lucifer19:英文太烂看不是很懂 140.120.135.23 03/05 18:14
3F：推 lucifer19:我看起来好像也都有关 140.120.135.23 03/05 18:16
4F：推 kobe4153837:4 42.79.64.49 03/08 00:39
5F：→ redfaction:下列何者会导致温度的上升。是这意思吧140.114.123.199 08/01 16:21
6F：→ redfaction:? 我想答案是4140.114.123.199 08/01 16:21
7F：推 sgps50103: 原po英文要加强，应该是4 36.231.244.92 12/10 10:28