Energetics Definitions 0.0 / 5 ? ChemistryEnergeticsASEdexcel Created by: willCreated on: 11-11-13 13:32 Enthalpy change A measure of heat energy given out or taken in when a chemical or physical change occurs under standard conditions. 1 of 6 Enthalpy change of reaction Enthalpy change in a reaction for one mole of a substance in their standard conditions. 2 of 6 Enthaply of formation The enthalpy change when one mole of a substance is formed from its elements under their standard conditions. 3 of 6 Enthaply of combustion The enthalpy change when one mole of a substance undergoes combustion under standard conditions. 4 of 6 Lattice energy the standard enthalpy change when one mole of a compound is formed from free ions. 5 of 6 What is hess' law? The sum of the enthalpy is the same regardless of the route taken providing the initial and final conditions are the same. 6 of 6
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