A rigid tank contains a fixed mass of air. The air is the system of interest and undergoes a finite process from state 1 to state 2. The process results in the final (state-2) pressure of the air being much less than the initial pressure (state 1).

A. Does the temperature increase or decrease? Explain your answer.

B. Is there any work associated with the process? If so, is the work done on or by the system? Explain your answer.

C. Does the internal energy of the system increase, decrease, or remain the same? Explain your answer.

D. Is there any heat interaction associated with the process? If so, is the heat interaction into or out of the system? Explain your answer.