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Following figure shows two processes A and B for a gas. If Δ Q A and Δ Q B are the amount of heat absorbed by the system in two cases, and Δ U A and Δ U B are changes in internal energies, respectively, then : P V i A B f

1. Δ Q A > Δ Q B , Δ U A > Δ U B
2. Δ Q A < Δ Q B , Δ U A < Δ U B
3. Δ Q A > Δ Q B , Δ U A = Δ U B
4. Δ Q A = Δ Q B ; Δ U A = Δ U B

Correct answer: Δ Q A > Δ Q B , Δ U A = Δ U B

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