# Question Provide a detailed solution and explanation In the following take CV = 5 and CP = 7 (Btu)(lb mole)−1(°F)−1 for nitrogen gas: (a)Three pound moles of nitrogen at 70(°F), contained in a rigid vessel, is heated to 350(°F). How much heat is required if the vessel has a negligible heat capacity? If it weighs 200(lbm) and has a heat capacity of 0.12(Btu)(lbm)−1(°F)−1, how much heat is required? (b) Four pound moles of nitrogen at 400(°F) is contained in a piston/cylinder arrangement. How much heat must be extracted from this system, which is kept at constant pressure, to cool it to 150(°F) if the heat capacity of the piston and cylinder is neglected?

Z7UCAG The Asker · Chemical Engineering

Provide a detailed solution and explanation

In the following take CV = 5 and CP = 7 (Btu)(lb mole)−1(°F)−1 for nitrogen gas:

(a)Three pound moles of nitrogen at 70(°F), contained in a rigid vessel, is heated to 350(°F). How much heat is required if the vessel has a negligible heat capacity? If it weighs 200(lbm) and has a heat capacity of 0.12(Btu)(lbm)−1(°F)−1, how much heat is required?

(b) Four pound moles of nitrogen at 400(°F) is contained in a piston/cylinder arrangement. How much heat must be extracted from this system, which is kept at constant pressure, to cool it to 150(°F) if the heat capacity of the piston and cylinder is neglected?

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