A piston-cylinder device contains 0.01 kg of steam at a pressure of 100 kPa and a quality

Question:

A piston-cylinder device contains 0.01 kg of steam at a pressure of 100 kPa and a quality of 10%. Determine the heat transfer necessary to improve the quality to 100% when heating is carried out.
(a) In a constant pressure manner by allowing the piston to move freely.
(b) In a constant volume manner by locking the piston in its initial position.