2021/9/51大学物理（热学）1)Review2)Carnot’scycle3)Entropy2006-12-21用热做功——存在限制否？Carnot’sideasQW“Thenecessaryconditionofthemaximumis,then,thatinthebodiesemployedbyrealizethemotivepowerofheatthereshouldnotoccuranychangeoftemperaturewhichmaynotduetoachangeofvolume.”Carnot’sideasCarnot’sCycle“AllreversibleenginesoperatingbetweenthesametwoconstanttemperaturesTHandTLhavethesameefficiency.Anyirreversibleengineoperatingbetweenthesametwofixedtemperatureswillhaveanefficiencylessthanthis.”Carnot’stheoremClausuisstatementNotpossibleClapeyron’sGraph(1834)绝热绝热e=W/QH=1-QL/QH=1-TL/THClausius’deduction(1865)QL/TL=QH/TH,QH/TH-QL/TL=0(Q/T)=0=0T...
