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## Homework Statement

A reversible engine contains 0.20 mol of ideal monatomic gas, initially at 600 K and confined to 2.0 L. The gas undergoes the following cycle:

Isothermal expansion to 4.0 L.

Isovolumic cooling to 300 K.

Isothermal compression to 2.0 L.

Isovolumic heating to 600 K.

Calculate the net heat added during the cycle.

I calculated heat add using Q=CvV(P1-P2)/R . I used that equation for two isovolumic process and got the difference

I got 750j, it is wrong, why?

Calculate the net work done during the cycle.

I used W=nRT ln(V1/V2) for isothermal and P(V1-V2) for isothermal compression

asd got the differnce. answer was 190 J again it wrong