Chapter 2, Problem 2.32P

In the following take $C_v=20.8$ and $C_p=29.1J\cdot mo{l}^{-1}\cdot °C^{-1}$ for nitrogen gas:

(o) Three moles of nitrogen at 30°C. contained in a rigid vessel, is heated to 250°C. How much heat is required if the vessel has a negligible heat capacity? If the vessel weighs 100 kg and has a heat capacity of $0.5kJ\cdot k{g}^{-1}\cdot °C^{-1}$ , how much heat is required?

(h) Four moles of nitrogen at 200°C 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 40°C if the heat capacity of the piston and cylinder is neglected?