Problem $2$:

A piston cylinder device contains $0\mathrm{.}05$ kg of superheated steam at $1$ MPa and $300$ C $.$ Steam now expands

to a final state of $200$ kPa and $150$ C doing work. Heat losses from the system to the surroundings are

estimated to be $2$ kJ during this process. Assume surroundings are at $100$ kPa and $25$ C $.$

Find: a$)$ Total Exergy of the system at initial and final state, b$)$ Boundary work, c$)$ Useful work, d$)$ Entropy

generated, e$)$ Exergy Destroyed, f$)$Second Law efficiency