Problem $1$: $(10$ marks$)$

$T_{\text{o}\text{l}\text{l},m}=100C$

The fluid in this heat pump is R$-134$a$.$ Determine:

a$)$ The temperature of R$-134$a leaving the compressor.

b$)$ The coefficient of performance $($COP$).$

c$)$ The total change of entropy $(k\frac{W}{K}).$

Oil has a constant specific heat of $2\mathrm{.}7k\frac{J}{k}g.$K$.$ Use the steam tables for R$-134$a