(a) One mole of a monatomic ideal gas undergoes a reversible expansion at constant pressure during which the entropy of the gas increases by 14.41 J/K and the gas absorbs 6,236 J of heat. Calculate the initial and final temperatures of the gas. (b) One mole of a second monatomic ideal gas undergoes a reversible isothermal expansion during which it doubles its volume, performs 1,729 J of work, and increases its entropy by 5.763 J/K. Calculate the temperature at which the expansion was conducted.