Freezing is an endothermic process, meaning it absorbs energy from its surroundings. As a liquid transitions into a solid during freezing, energy is released and absorbed, creating the enthalpy change (ΔH). Heat plays a vital role, driving the freezing process and determining the rate of solidification. Phase transitions involve the exothermic release of heat during freezing (energy is released into the surroundings) and the endothermic absorption of heat during melting (energy is absorbed from the surroundings).
