作者hutiger (我不是神經病)
看板ChemEng
標題[問題] 一題熱力學問題
時間Wed Oct 28 23:37:44 2009
When an ideal gas is allowed to expand isothermaly in a piston
,△U = Q + W = 0 .Thus the work done by the system on the surroundings
is equal to the heat transferred from the reservoir to the gas ,and
the efficiency of turning heat into work is 100% .Explain why this is
not a violation of the second law .
我目前只有想到類似熱機的概念
Q(h) = Q(c) + W
→ Q(h) - Q(c) = W
→ Q = W
不曉得這樣想何不合理
還是有更好的解釋?
誠請板友指導我一下 感謝!!
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.135.51.1
※ 編輯: hutiger 來自: 140.135.51.1 (10/28 23:39)