a) around 12 kJ (answer)

b) around 6 kJ (answer)

c) around -1 kJ (answer)

1mol of steam is initially at 10bar and 200C. The surroundings are at 20C and 1 bar. (a) Calculate the exergy of the system. (b) Calculate the change in exergy for a process where the steam is heated at constant pressure until the volume doubles. (c) Calculate the change in exergy for a process where the steam isothermally expands until its volume doubles