What quantity of energy does it take to convert 0.600 kg ice at –20.°C to steam at 250.°C? Specific heat capacities: ice, 2.03 J/g·°C; liquid, 4.2 J/g·°C; steam, 2.0 J/g·°C; = 40.7 kJ/mol; = 6.02 kJ/mol.