Consider the expansion of one mol of a monoatomic gas initially at 300 K and 10 atm. The expansion to a final pressure of 1 atm occurs in four different ways:
(a) Isothermal reversible.
(b) Isothermal irreversible against a constant external pressure of 1 atm.
(c) Adiabatic reversible.
(d) Adiabatic irreversible against a constant external pressure of 1 atm.