Question

1) Airconditioners operate on the same principle asrefrigerators.Consider an air conditioner that has 7.00 kg ofrefrigerantflowing through its circuit each cycle. The refrigerantenters theevaporator coils in phase equilibrium, with 54.0 % of itsmassas liquid and the rest as vapor. It flows through theevaporator ata constant pressure and when it reaches the compressor95 % ofits mass is vapor. In each cycle, how much heatQ_c isabsorbed by the refrigerant while it is in theevaporator? The heatvaporization of the refrigerantis1.50×10⁵ J/kg.

Express your answer numericallyinjoules.

2) In eachcycle,the change in internal energy of the refrigerant when itleaves thecompresser is 1.20×10⁵ J. What is the workWdone by the motor of the compressor?

Express your answer injoule

3) If the direction of the refrigerant flow is inverted in anairconditioner, the air conditioning unit turns into a heat pumpand itcan be used for heating rather than cooling. In this case,the coilswhere the refrigerant would condense in the airconditioner becomethe evaporator coils when the unit is operatedas a heat pump, and,vice versa, the evaporator coils of the airconditioner become thecondenser coils in the heat pump. Supposeyou operate the airconditioner described in Parts A and B as aheat pump to heat yourbedroom. In each cycle,what is the amount of heat Q_hreleased into theroom? You may assume that the energy changes andwork doneduring the expansion process are negligible compared tothose forother processes during the cycle.