A cylinder with a moveable piston inside it holds a volume of air of 0.125 m^3 a

Question

A cylinder with a moveable piston inside it holds a volume of air of 0.125 m^3 at a pressure of 25.7 kPa. The poison inside moves, changing the volume to 0.925 m^3, although the temperature of the gas does not change. (See the diagram at right.) Answer the three questions below, using three significant figures. This gas process would be classified as what? (Pick the correct answer.) An adiabatic process An isobaric process An isochoric process An isothermal process An anachronistic process Consider any work or heat flow occurring with this process. (Pick all the statements that are correct.) There must be heat entering the gas somehow. There must be heat leaving the gas somehow. There is no heat entering or leaving the gas. Something is performing work on the gas.

Explanation / Answer

Part A) If gas temperature does not change, it is an isothermal process

Part B)

there is no heat entering or leaving the gas

Something is performing work in the gas

Part C)

Pf=Po(Vo/Vf)

Pf=25.7kPa (0.125/0.925)=3.47 kPa

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