The 250 litre cylinder of a steam train contains superheated steam at 300°C and 10 atm. Assuming Cv = 712R calculate

(a) Find numerical values for the specific heat of the steam at constant volume and at constant pressure in SI units.

(b) The number of moles of the steam in the cylinder.

(c) The amount of energy released as the steam cools down to 100°C if the piston is free to move, and we assume that the pressure remains constant.

(d) The amount of energy released as the steam cools down to 100°C if the piston is held in a fixed position.