(a) How much work is done on the steam when 2.47 mol of water at 100°C boils and becomes 2.47 mol of steam at 100°C at 1.00 atm pressure? (Assume the latent heat of vaporization of water is 2.26 x 106 J/kg.) ku (b) Assume the steam to behave as an ideal gas. Determine the change in internal energy of the system of the water and steam as the water vaporizes. k]