The gas is first cooled at constant volume until it reaches its final pressure.

Question

The gas is first cooled at constant volume until it reaches its final pressure. It is then allowed to expand at constant pressure until it reaches its final volume. (Use the following as necessary: P1 = 3.20 atm, V1 = 0.90 L, and Eint 1 = 455 J and its final state P2 = 1.80atm, V2 = 3.20 L, and Eint 2 = 913 J.)

(a) Illustrate this process on a PV diagram (Do this on paper. Your instructor may ask you to turn in this work.) What is the work done by the gas.

(b) Find the heat absorbed by the gas during this process.

Explanation / Answer

at consatnt volume

work done=0

at constant pressure W2=(P2-P1)V2

total work done=W=W2

E1=Q1+W1

Q1=E1

E2=Q2-W2

Q2=E2+W2

heat absorbed=Q1+Q2

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