Initially, inside a rigid cylinder, there is a certain amount of mass M of superheated water vapor at T1=250deg C and p1=1MPa with its initial specific internal energy u1. The circular lids of the cylinder are adiabatic, while the side wall is not. A metal coil is placed that absorbs the heat from the cylinder until the substance inside it reaches a final temperature T2=125deg C and a specific internal energy u2. The volume of the cylinder is 0.23275 m^3

a) If there is no loss of energy when the coil absorbs heat, express the heat expelled by the substance as a function of M, u1, u2.

b) Find the specific volume v1 and the specific energy u1

c) Find the mass M

d) The value of the heat expelled by the substance if the quality in the final state is x2=0.3011