Question

Why does 1 g of water at 0°C have 336 J more heat energy than 1g of ice at 0°C?

Answer 1

1 g of ice at 0°C absorbs 336 J of latent heat of fusion to become 1 g of water at 0 °C. The specific latent heat of fusion of ice is 336 J g⁻¹, so heat absorbed = m × L = 1 g × 336 J g⁻¹ = 336 J. This energy increases the intermolecular separation and potential energy of the molecules without raising the temperature. Hence, 1 g of water at 0°C has 336 J more heat energy stored in it than 1 g of ice at 0°C.