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Refrigerant 134a enters an adiabatic compressor at 100 kPa and -20 degrees Celsius with a volume flow rate of 3 m3/min

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Refrigerant 134a enters an adiabatic compressor at 100 kPa and -20 degrees Celsius with a volume flow rate of 3 m³/min. and leaves at a pressure of 800kPa. The power input to the compressor is 15kW. Determine the mass flow rate of the refrigerant.