One mole of liquid water at 100oC is heated until the water is completely converted to vapor at 100oC and 1 bar pressure. Calculate q, w, ΔU, and ΔH for:
b) The cylinder is first expanded against a vacuum (pex = 0) to the same volume as in part (a), and then sufficient heat is added to vaporize the liquid completely to 1 bar pressure.
This is part A with the same conditions:
a) The vaporization is carried out in a cylinder where the external pressure on the piston is maintained at 1 bar throughout.