A real enging operates between T c andT h . During a certain time, an amount Q c

Question

A real enging operates between Tc andTh. During a certain time, an amount Qcof heat is released to the cold reservoir. During that time, whatis the maximum amount of work Wmax that an engine mighthave performed? useful equations:Qc/Qh= Tc/Th andW=Qh-Qc A real enging operates between Tc andTh. During a certain time, an amount Qcof heat is released to the cold reservoir. During that time, whatis the maximum amount of work Wmax that an engine mighthave performed? useful equations:Qc/Qh= Tc/Th andW=Qh-Qc

Explanation / Answer

   Qh /Qc   =   Th /Tc    =>   (Qh /Qc)   -   1   =   (Th/ Tc)   -   1    (Qh - Qc) /Qc   =   (Th   -   Tc)/ Tc    Workdone   Wmax   =   (Qh- Qc)   =   Qc* (Th   -   Tc)/ Tc    Workdone   Wmax   =   (Qh- Qc)   =   Qc* (Th   -   Tc)/ Tc    

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