The expansion can occur via any one of four different paths: a) isothermal and reversible, b) isothermal and irreversible, c) adiabatic and reversible, and d) adiabatic and irreversible. In irreversible processes, the expansion occurs against an external pressure of 1.00 atm. One mole of an ideal monatomic gas initially at 300 K and a pressure of 15.0 atm expand to a final pressure of 1.00 atm. For each case, describes the values of q, w, delta U, and delta H.