EXOTHERMIC ( EXit )
Heat energy is released.
Egs: acid and metal reactions, neutralization, condensation, freezing and bond-making
Heat of Reaction (Enthalpy change) = negative
Tips for remembering: When two persons get together ( bond-making), they are in love and they will release 'sparks' of love ( 'Heat energy release') [ laugh]
ENDOTHERMIC
Heat energy is absorbed.
Eg: decomposition, melting, boiling, bond-breaking
Heat of Reaction ( Enthalpy change ) = positive
Tips for remembering: When a couple wants to break up ( bond-breaking), they need to gather all their complains and greviances to quarrel ('Heat energy gain') [laugh]
