作者mimicJ (不愉快です)
看板ChemEng
標題[問題] 熱力學(是非題)
時間Fri Jan 10 17:16:07 2014
題目要問true or False
(1)For every reversible process in a closed system;ΔS=ΔH/T
ans:True
我的問題:ΔS=ΔH/T 這個公式不是只能用在可逆相變化，答案應該是false
(2)Q=0 for every isothermal process in a closed system.
ans:True
我的問題:Q=0不是應該是adiabatic process，為什麼題目說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
這題不太懂為什麼是false
謝謝大家
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◆ From: 114.45.61.57
※ 編輯: mimicJ 來自: 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