作者axis0801 (时和空的流转)
站内TransPhys
标题Re: [热能] 等温压缩
时间Thu May 31 01:59:22 2007
※ 引述《pobm (待从头收拾旧河山)》之铭言:
: Three moles of an ideal gas undergo a reversile isothermal compression
: at 20C. During this compression, 1850J of work is done on the gas.
: What is change of entropy of the gas?
: 应该是-1850/293对吧
: 可是Young的解答写1850/293耶
: 是我错了吗?
: 谢谢^^
题目指出是可逆等温压缩
所以是外界对系统作功,这样系统一定要 "放热",不然内能就会改变
等温压缩 => Q = -W = -1850 (J)
这是我的想法,仅供参考!
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1F:推 pobm:谢谢^^ 06/05 01:24