[b0mb3rz]

ive tried the following question which is as follows
the cycle belo is a commercial refrigeration system . a refrigerant passes continuously at steady state rate, m, through the process. energy transformations at different pressures are used to absorb heat in the evaporator ( allowing cooling to take place) and dissipate it at the condenser. determine the:
a) mass flow rate of the refridgerent around the cycle
b) heat transfer to the evaporator
c) enthalpy of the refrigerant entering the evaporator

for a)
assuming change in KE and PE are 0
i got the energy balance equation for open steady state to be
m(h₂-h₁)+Q=0
m(200-65)-1500=0
m=11.1kg/s

b)
i used the formula 0=Q_in+Q_out+W_in
so subbing in values i got
Q_in=1500-310=1190W

c) using the energy balance equation
m(h₄-₃)=0 with change in KE and PE being 0
here would i then do
h₄-h₃=∫C_pdt
and then sub in all the values to find h₄?

or is the answer just 65kj

any help would be appreciated

thanks for your time