Question

Define and explain enthalpy of freezing.

Answer 1

Enthalpy of freezing (Δ_freezH): The enthalpy change that accompanies the solidification of one mole of a liquid into solid at constant temperature and pressure is called enthalpy of freezing.

For example, \[\ce{H2O(l) -> H2O(s) \Delta_{freez}H = -6.01 kJ Mol^{-1}}\]

This equation describes that when one mole of water freezes (solidifies) at 0°C (273 K) and 1 atmosphere, 6.01 kJ of heat will be released to the surroundings.