A 10 m3 insulated rigid tank contains 30 kg of wet steam with a quality of 0.9.

Question:

A 10 m3 insulated rigid tank contains 30 kg of wet steam with a quality of 0.9. An internal electric heater is turned on, which consumes electric power at a rate of 10 kW. After the heater is on for one minute, determine
(a) The change in temperature.
(b) The change in pressure.
(c) The change in entropy of steam.