Question

Consider a Carnot cycle that goes isothermally from A (pa,Va,Thot) to B (pb, Vb ,Thot), adiabatically...

Consider a Carnot cycle that goes isothermally from A (pa,Va,Thot) to B (pb, Vb ,Thot), adiabatically to C (pc, Vc ,Tcool), isothermally to D (pd, Vd ,Tcool), and adiabatically back to A (pa,Va,Thot); pa is the maximal pressure. (a) Sketch the pV diagram for this Carnot cycle. (b) Calculate the change in entropy DS for the A-B isotherm, calculate the change in entropy DS for the B-C adiabatic expansion. (Hint: DS for adiabat B-C is not equal to zero; DS is a state function)

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Answer #1

The hint given is incorrect.

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