Question: how much energy in kilojoules is released when 15.3 g of steam?
Answer: 100°C vapor 100°C water vapor to liquid) Mass Noof moles of H,O = Molar mass 15.3 g = 0.849 mol 11 18.02 g/mol [AHndA 0.849 mol x (-40.67 x 103 kJ/g = -AHap Heat, q, nAH ΔΗ, cond cond = -34528.83 J 34528.83 J heat is released during condensation.