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$12-16$ A refrigerator uses refrigerant$-134$a as the working fluid and operates on the ideal vapor$-$compression refrigeration cycle except for the compression process. The refrigerant enters the evaporator at $120$ kPa with a quality of $34$ percent and leaves the compressor at $70C.$ If the compressor consumes $450$ W of power, determine $(a)$ the mass flow rate of the refrigerant, $($b$)$ the condenser pressure, and $($c$)$ the COP of the refrigerator. Answers: $($d$)0\mathrm{.}00644$ kg s$,($b$)800$ kPa $,($c$)203$

FIGURE P$12-16$