The refrigerator door is closed. The air in the refrigerator is cooled to 5.0°C and thenumber of air molecules in the refrigerator stays the same.(i) Determine the pressure of the air inside the refrigerator.

The air in a kitchen has pressure 1.0 × 105 Pa and temperature 22°C. A refrigerator of internalvolume 0.36 m3 is installed in the kitchen.(a) With the door open the air in the refrigerator is initially at the same temperature andpressure as the air in the kitchen. Calculate the number of molecules of air in therefrigerator.

If a refrigerator is operated in an enclosed room, opening the door of the refrigerated compartment will allow you to use the fridge to cool the roomQuestion 5Select one:a.TRUEb.FALSE

Q. Which of the following gas is used in Refrigerator for cooling?

A rigid container with a volume of 2 m3 contains twenty kilograms of refrigerant 134aat an initial pressure of 240 kPa. The container is cooled until the pressure of therefrigerant is 100 kPa. Determine:a) The initial temperature of the refrigerant; (5 marks)b) The final state (i.e., compressed liquid, saturated liquid, saturated mixtureetc.) of the refrigerant, giving your reasoning; and (3 marks)c) The heat transfer associated with the process. (14 marks)d) Sketch the process on a P-v diagram.

A refrigerator that consumes 3 kW of electricity when running and has a coefficient of performance of 1.5 is placed in a well-sealed room, and is plugged in with its door open. The rate of cooling or heating this refrigerator will provide to the air in the room when running isQuestion 8Select one:a.3 kJ/s, coolingb.4.5 kJ/s, coolingc.2 kJ/s, heatingd.4.5 kJ/s, heatinge.3 kJ/s, heating