$1-$ Saturated water vapor at $160C$ ina piston$/$cylinder arrangement of initial volume $0\mathrm{.}02m^3.$ The steam now expands in a polytropic process with exponent $n=1$ to a final pressure while it does work against the piston.

Assume a value for the final pressure between $165$ and $265$ kPa and,

a$-$State any other assumptions you have made for this process.

b$-$ Determine the work and heat transfer in this process.