It depends on what the starting temperature is! Assuming it is at 100°C (and 1 bar presssure) then you multiply the mass by the latent heat of vaporisation of 2260 kJ/kg
It depends on what the starting temperature is! Assuming it is at 100°C (and 1 bar presssure) then you multiply the mass by the latent heat of vaporisation of 2260 kJ/kg