Questions

In the given graph, an ideal gas can change its state from A to C by two paths ABC or AC. Taking, the internal energy of gas at ‘A’ is 10 J, mark the CORRECT option(s)

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The amount of heat supplied in path AC is 200 J, then the internal energy of gas at ‘C’ is 150 J.

The amount of heat supplied in path AC is 200 J, then the internal energy of gas at ‘C’ is 75 J.

If the internal energy of gas at state B is 20 J. Then the amount of heat supplied to the gas to go from A to B may be 5 Joule.

If the internal energy of gas at state B is 20 J. Then the amount of heat supplied to the gas to go from A to B must be 10 Joule.

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detailed solution

Correct option is A

In path A→CW=4×10+12×10×4=40+20=60 J Q=ΔU+W 200=UC−UA+60 UC=140+UA=140+10=150 JIn path A→BQAB=UB−UA =UB1−UAUB=UB1−TATB =201−12=10 Joule

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