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Enthalpy change

AS

Energetics

Physical

AQA Content

define standard enthalpy of combustion (∆cHƟ)
define standard enthalpy of formation (∆fHƟ).

Specification Notes

Reactions can be endothermic or exothermic.
Enthalpy change (∆H) is the heat energy change measured under conditions of constant pressure.
Standard enthalpy changes refer to standard conditions, ie 100 kPa and a stated temperature (eg ∆H298Ɵ).

Notes

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