作者mimicJ (不愉快です)
看板ChemEng
标题[问题] 热力学(是非题)
时间Fri Jan 10 17:16:07 2014
题目要问true or False
(1)For every reversible process in a closed system;ΔS=ΔH/T
ans:True
我的问题:ΔS=ΔH/T 这个公式不是只能用在可逆相变化，答案应该是false
(2)Q=0 for every isothermal process in a closed system.
ans:True
我的问题:Q=0不是应该是adiabatic process，为什麽题目说isothermal
(3)In every cyclic process, the final and initial states of the system
are the same and the initial and final states of the surroundings are the same.
ans:False
这题不太懂为什麽是false
谢谢大家
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※ 编辑: mimicJ 来自: 114.45.61.57 (01/10 17:17)
1F：推 guitarspirit:(1)For an ideal gas undergoes 114.36.7.6 02/01 23:22
2F：→ guitarspirit:an isentroic process from 114.36.7.6 02/01 23:22
3F：→ guitarspirit:T1 to T2 in a closed system 114.36.7.6 02/01 23:22
4F：→ guitarspirit:→ ΔS=0 ΔH≠0 114.36.7.6 02/01 23:22
5F：→ guitarspirit:→ ΔS≠ΔH/T → False 114.36.7.6 02/01 23:22
6F：→ guitarspirit:(3)In every irreversible process 114.36.7.6 02/01 23:23
7F：→ guitarspirit:ΔS(total)=ΔS(sys.)+ΔS(surr.)≧0 114.36.7.6 02/01 23:24
8F：→ guitarspirit:ΔS(system)=0 → ΔS(surr.)≧0 114.36.7.6 02/01 23:24
9F：→ guitarspirit:→ΔSf(surr.)≠ΔSi(surr.)→False 114.36.7.6 02/01 23:24