A gas undergoes a change of state during which 100J of heat is supplied to it and it does 20J of work. The system is brough back to its original state through a process during which 20 J of heat is released by the gas. What is the work done by the gas in the second process?
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Explanation:
Heat absorbed =work done
Q 1 +Q 2 = W1 +W2
100−20 = 20+W2
W2 =60J
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