Enthalpy change (ΔH)

Definition

Enthalpy change is the heat absorbed or released by a system during a chemical reaction at constant pressure. It is a key factor in determining whether a reaction is endothermic (absorbing heat) or exothermic (releasing heat).

Related terms

Endothermic Reaction:

A chemical reaction that absorbs heat from its surroundings.

Exothermic Reaction:

A chemical reaction that releases heat to its surroundings.

Gibbs Free Energy:

A thermodynamic quantity used to predict whether a reaction will proceed spontaneously at constant temperature and pressure