BRAINCAKEEnthalpy and Enthalpy Change
Enthalpy is a measure of the total energy of a chemical system. The enthalpy change of a process is the heat energy that is transferred between the system and its surroundings at constant pressure.
The difference in the enthalpy of the reactants and products is called the enthalpy change ΔH.
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All 21 lessons in Enthalpy · All Edexcel AS-level Chemistry topics