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## ir at 3 bar and 25°C expands to 1 bar and 25°C by the following mechanically-reversible process:heated at constant pressure followed by cooling at constant volume. Calculate the heat andwork requirements and ∆U and ∆H of the air for this path. For air assume the following heat capacities(independent of temperature):CV= 20.785 J mol−1K−1and CP= 29.1 J mol−1K−1. Also assume that the air remains a gas with PV/T=constant, at 1 barand 25°C the molar volume of the air is ̄V= 0.02479m3mol−1

ir at 3 bar and 25°C expands to 1 bar and 25°C by the following mechanically-reversible process:heated at constant pressure followed by cooling at constant volume. Calculate the heat andwork requirements and ∆U and ∆H of the air for this path. For air assume the following heat capacities(independent of temperature):CV= 20.785 J mol−1K−1and CP= 29.1 J mol−1K−1. Also assume that the air remains a gas with PV/T=constant, at 1 barand 25°C the molar volume of the air is ̄V= 0.02479m3mol−1

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