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Two moles of a gas with a constant‑volume molar specific heat of 20.8 J / (...

Two moles of a gas with a constant‑volume molar specific heat of 20.8 J / ( mol ⋅ K ) is transformed from state A, with temperature T I = 291 K, to state B, with temperature T F = 327 K, as shown in the diagram.

What was the change in the entropy ΔSΔS of the gas?

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