Looks like no one added any tags here yet for you.
Enthalpy Change of Reaction
The standard enthalpy change of reaction is the enthalpy change that accompanies a reaction in the molar quantities shown in a chemical equation under standard conditions with all reactants and products in their standard states.
Enthalpy Change of Formation
The Standard enthalpy change of formation is the enthalpy change that takes place when 1 mole of a compound is formed from its elements under standard conditions, with all reactants and products in their standard states.
Enthalpy Change of Combustion
The standard enthalpy change of combustion is the enthalpy change that takes place when 1 mole of a substance reacts completely with oxygen under standard conditions, with all the reactants and products in their standard states.
Enthalpy Change of Neutralisation
The standard Enthalpy change of Neutralisation is the energy change that accompanies the reaction of an acid by a base to form one mole of water under standard conditions, with all reactants and products in their standard states.