Physical chemistry definitions

Question 1

Standard enthalpy change of reaction

Answer 1

this is the energy change that is associated with a given reaction

Question 2

Standard enthalpy change of combustion

Answer 2

the energy change that takes place when 1 mole of substance reacts completely with oxygen under standard conditions where all reactants and products have been in their standard state

Question 3

Standard enthalpy change of formation

Answer 3

An energy change that takes place when 1 mole of a compound is formed from its constituent elements in their standard states under standard conditions

Question 4

Enthalpy change of neutralisation

Answer 4

this is the energy change that is associated with the formation of 1 mole of water from a neutralisation reaction