How much energy (in kilojoules) is released when 12.7g of steam at 121.0 degrees Celsius is condensed to give liquid water at 79.0 degrees Celsius? The heat of vaporization of liquid water is 40.67 kJ/mol, and the molar heat capacity is 75.3 J/(K*mol) for the liquid and 33.6 J/(K*mol)for the vapor.