Question 1 In a closed system, 0.6kg of wet steam at a pressure of 5 bar and a dryness fraction of 0.2 is heated at constant pressure until the volume occupied is 0.18m3. (A)Calculate the change in internal energy, the work energy and the heat energy transferred during the process. Question 2 In a closed system, 0.25m3 superheated steam at a pressure of 10 bar and a temperature of 300°C cools at a constant pressure until the volume becomes 0.15m3. Determine: (A)The mass of the steam in the system (B)The dryness fraction of the steam after cooling. For question 2, the question says that find the dryness fraction of the steam after cooling, this shows that the steam is wet steam. But for question 1, the question did not give me a hint to find dryness fraction of the steam. How do I know that I need to find the dryness fraction in order to solve the question? And what confuses me is that how did the wet steam from question 1 remains as wet steam after heating? I thought it will be either dry saturated steam or superheated steam. Thanks..