Useful constants 334 J/g Heat of fusion (Hf) (melting or freezing) 2260 J/g Heat of vaporization (Hv) (evaporating or condensing) 2.10 J/g °C Heat capacity (c) of solid water 4.18 J/g °C Heat capacity (c) of liquid water A 50.0 g sample of liquid water at 0.0°C ends up as ice at - 20.0 °C. You calculated how much energy was involved in this change. What effect will the energy change you calculated above have on the temperature of the surroundings? Explain.​