推 pobm:謝謝^^ 06/05 01:24
※ 引述《pobm (待從頭收拾舊河山)》之銘言:
: 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?
: 應該是-1850/293對吧
: 可是Young的解答寫1850/293耶
: 是我錯了嗎?
: 謝謝^^
題目指出是可逆等溫壓縮
所以是外界對系統作功,這樣系統一定要 "放熱",不然內能就會改變
等溫壓縮 => Q = -W = -1850 (J)
這是我的想法,僅供參考!
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