What are Standard conditions
100kpa 298k
What is enthalpy change
Heat energy change in a reaction at constant pressure
What is standard enthalpy change of reaction
Enthalpy change when a reaction occurs in the molar quantity’s shown in the chemical equation under standard conditions
Standard enthalpy change of formation
Enthalpy change when 1 mole of compound is formed from its elements in their standard states under standard conditions
Standard enthalpy change of combustion
Enthalpy change when 1 mole of a substance is completely burned in oxygen under standard conditions
Standard enthalpy of neutralisation
Enthalpy change when an acid and alkali react together under standard conditions to form 1 mole of water
Hesss law
Total energy Change is independent of the pathway taken
Bond enthalpy
Amount of energy required to break 1 mole of the states bond in the gas phase
Mean bond enthalpy
Average amount of energy needed to break a specific bond, measured over a variety of different molecules
