[問題] 熱力學(是非題)

看板ChemEng作者 (不愉快です)時間10年前 (2014/01/10 17:16), 編輯推噓1(1推 0噓 8→)
留言9則, 1人參與, 最新討論串1/2 (看更多)
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 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 114.45.61.57 ※ 編輯: mimicJ 來自: 114.45.61.57 (01/10 17:17)
推
02/01 23:22, , 1F
(1)For an ideal gas undergoes
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→
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an isentroic process from
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→
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T1 to T2 in a closed system
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→
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→ ΔS=0 ΔH≠0
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→
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→ ΔS≠ΔH/T → False
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→
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(3)In every irreversible process
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→
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ΔS(total)=ΔS(sys.)+ΔS(surr.)≧0
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→
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ΔS(system)=0 → ΔS(surr.)≧0
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→
02/01 23:24, , 9F
→ΔSf(surr.)≠ΔSi(surr.)→False
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文章代碼(AID): #1IpxfPsE (ChemEng)
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文章代碼(AID): #1IpxfPsE (ChemEng)