define enthalpy change

what is an exothermic reaction?

what is an endothermic reaction?

define the standard enthalpy change of formation

what is standard pressure?

what is standard temperature?

define the standard enthalpy change of combustion

what is standard concentration?

what does incomplete combustion produce?

define the standard enthalpy of electron affinity

define the standard enthalpy of neutralisation

define the standard enthalpy of atomisation

define the standard enthalpy change of ionisation energy

define the standard enthalpy change of lattice enthalpy

are neutralisation reactions exothermic or endothermic?

state Hess' law