請教熱力學的比熱用法 - 國營工作討論

By Carolina Franco
at 2019-08-28T18:23
at 2019-08-28T18:23
Table of Contents
如題,請問在計算熱力學中的各個循環時,要怎麼判斷什麼時候用等容比熱或等壓比熱呢
?
比如
空氣標準迪賽爾循環中
設過程1->2為等熵壓縮
用熱力學第一定律會寫成
Q12 - W12 = Cv(T2 - T1)
還是
Q12 - W12 = Cp(T2 - T1)呢?
另外
像布萊登循環這種有分開放和封閉兩種的是否在比熱選擇上也有所不同?
--
?
比如
空氣標準迪賽爾循環中
設過程1->2為等熵壓縮
用熱力學第一定律會寫成
Q12 - W12 = Cv(T2 - T1)
還是
Q12 - W12 = Cp(T2 - T1)呢?
另外
像布萊登循環這種有分開放和封閉兩種的是否在比熱選擇上也有所不同?
--
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