A piston-cylinder device contains 0.85 kg of refrigerant R-134aat -10C. The pist

A piston-cylinder device contains 0.85 kg of refrigerant R-134aat -10C. The piston that is free to move has a mass of 12 kg anda diameter of 25 cm. The local atmospheric pressure is 88 kPa. Nowheat is transferred to the R-134a until the temperature is 15C.Determine (a) the final pressure (b) the change in the volume ofthe cylinder and (c) the change in the enthalpy of the R-134a.