Question

Situation 1: A gas expands at constant pressure P1 from volume V1 to volume V2. It is then kept at constant volume while the pressure is reduced to P2.

Situation 2: A gas is reduced in pressure from P1 to P2 while its volume is held constant at V1. It is then expanded at constant pressure P2 to a final volume V2.

In which of the processes is more work done by the gas? Why?

Answer 1

I gas expanding at constant pressure P, from Volume Up to V2 then at eanstant volume 12 gas is compressed to pressure. P2, no atoms woenk clowne (02= (V2-V.) = play) wan dome 23= o volumes ansient) P2 / T Si vozu 010) Voir WT = W12+623 WT, = 1,(=Ui) = Blau) --O 67 A gas in eroduced from Ri to pa at constant volume vi then expand at constant pressure from vi to Uz the Pu dicapaim of this process can be expressed as poplatm) wank deme W2 = 0 (volumelo ansdent) wank clame 123 = P2 (12-4,) = P2 AY P2 23 ultry ralya 0127 W23 WT = PRAY - o If we campare Ego q eg@ PlJP2 we can m Du diagram .: PiCov)) Palav.) : WT, > WT₂ .:: So work done by the gas Situation 1 is more

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