2. Consider the pressure-volume plots for the following processes. The system is an ideal gas in a frictionless piston. Assume that the surroundings are large enough so that if heat is withdrawn from or added to the system, the temperature of the gas does not change. The dashed line represents the equation PV= constant. For each plot, indicate whether the process is expansion or compression, and whether it is reversible or irreversible. Indicate by shading the absolute value of w. Expansion or compression? Expansion or compression? Reversible or irreversible? Reversible or irreversible? Expansion or compression? Expansion or compression? Reversible or irreversible? Reversible or irreversible? Which of these four processes (ABCD) has the largest (most positive) value of q ? Which processes (ABCD) have the same value of E