Chemistry Enthalpy Definitions
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6 Terms
Activation energy
the energy that is required to break bonds which is the energy barrier for any reaction
Standard enthalpy of formation
the enthalpy change when one mole of compound is formed from its elements in their standard states under standard conditions
Standard enthalpy of combustion
the enthalpy change when one mole of substance is burned completely in oxygen under standard conditions in standard states
Standard enthalpy change of neutralisation
the enthalpy change that accompanies the reaction of an acid with a base to form one mole of water under standard conditions with standard states
Average bond enthalpy
the energy required to break one mole of a specified type of bond in a gaseous molecule
Hess’ law
the total enthalpy change accompanying a chemical change is independent of the route by which the chemical change takes place
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