Standard Enthalpy change definitions

Hess Law

________= the enthalpy change for any reaction is independent of the route taken from reactants to products providing starting and final conditions are the same.

Enthalpy

________= is the amount of chemical energy in the system that can be converted to heat energy.

Standard enthalpy change of formation

______= the enthalpy change when one mole of a compound is formed from its elements in their standard states under standard conditions

standard enthalpy change of atomisation

the enthalpy change when one mole of gaseous atoms forms from the element in its standard state

Standard enthalpy change of solution

the enthalpy change when one mole of a compound is completely dissolved in water under standard conditions

Standard enthalpy change of hydration

The enthalpy change when one mole of isolated gaseous ions is dissolved in water forming one mole of aqueous ions under standard conditions

Standard enthalpy change of neutralisation

the enthalpy change when an acid is neutralised by a base to form one mole of water under standard conditions

Standard enthalpy change of combustion

The enthalpy change when one mole of substance burns completely in oxygen under standard contusions

Standard enthalpy change of reaction

The enthalpy change when the molar quantities of reactants as started in the equation react under standard contusions

Lattice enthalpy

the energy released when 1 mole of solid ionic compound if formed from its gaseous ions under standard conditions

First electron affinity

the enthalpy change when 1 mole of gaseous atoms gains a mole of electrons to form one mole of gaseous 1- ions

Bond enthalpy

the energy required to break 1 mole of covalent bonds in the gas state