作者hutiger (我不是神经病)
看板ChemEng
标题[问题] 一题热力学问题
时间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 .
我目前只有想到类似热机的概念
Q(h) = Q(c) + W
→ Q(h) - Q(c) = W
→ Q = W
不晓得这样想何不合理
还是有更好的解释?
诚请板友指导我一下 感谢!!
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※ 编辑: hutiger 来自: 140.135.51.1 (10/28 23:39)