state $1$ p$=240$kpa, T$=-1\mathrm{.}18$c

state $2$ p $=1200$kpa

state $3$ p$=1200$kpa, T$=41\mathrm{.}09$c

state $4$ p$=240$kpa

Determine the specific enthalpy and entropy of the refrigerant at the entry and the exit of the compressor and the entry and exit of the expansion valve.

draw Temperature Pressure enthalpy entropy phase table

draw t$-$s diagram