Monday, January 17, 2011

Enthalpy Changes

Enthalpy of combustion
Heat released when 1 mole of substance is completely combusted in oxygen gas
ex:


Enthalpy of neutralization
Heat released when 1 mole of water is formed when acid reacts with base
ex:




Enthalpy of hydration
Heat released when 1 mole of gaseous ion is hydrated in aqueous solution
ex:




Enthalpy of formation
Heat change when 1 mole of compound is produced from its element
ex:



Enthalpy of solution
Heat change when 1 mole of substance dissolves in solvent/water (dissolution) to form infinite dilute solution
ex:




Enthalpy of atomization
Heat absorbed when 1 mole of gaseous atom is formed from its element
ex:


Enthalpy of sublimation
Heat absorbed when 1 mole of substance in solid state is sublimed
ex: