A rigid container with volume of 200 L is divided by a partition resulting to two equal volumes A and B. Volume A has air at 2 MPa, 300°C while Volume B has air at 1 MPa, 60°C. The partition was then removed, and the air comes to a final uniform state at 110°C. Assuming that the ambient temperature is 25°C, and that specific heats are constants, determine:

A-C line Liquid R-134a A rigid container containing 6.6 kg of saturated liquid R-134a at 24°C is used to fill an air-conditioning system. A valve is opened and allows liquid R-134a to escape the tank into the A-C line until only 0.49 kg of R-134a remains in the tank, at which point the valve is closed. During the process, heat transfer is allowed to occur to maintain the tank temperature at 24°C. What is the quality of the refrigerant inside the tank at the end of the process? What is the total heat transfer for this process? KJ

What is an adiabatic process? What is an adiabatic system?

Putting hot foods into the refrigerator without cooling them first not only wastes energy but also could spoil the foods nearby. Is it true?