An ideal gas is made to undergo the cyclic process shown in Figure. For each of the steps A, B, and C, determine whether each of the following is positive, negative, or zero: (a) the work done on the gas; (b) the change in the energy content of the gas; (c) the heat added to the gas. Then determine the sign of each of these three quantities for the whole cycle. What does this process accomplish?
Figure: PV diagrams
In this question, we need to determine if the process is positive, negative or zero
the work done on the gas
change in energy content of gas
the heat added to the gas
Let us consider the given PV diagram