okay. i can't remember a thing now. and i'm freaking out. i cannot afford to screw this two tests up. amaths and pure chem!!!


ENERGY CHANGES.

EXOTHERMIC.
-bond-making
-gives out energy.
-products < reactants (energy kJ)
-enthalpy change: always -tive.

ENDOTHERMIC.
-bond-breaking
-takes in energy
-reactants < products (energy kJ)
-enthalpy change: always +tive.

gosh. why am i still making careless mistakes. why do i still mix their terms up?! HOW?! okay. BOND-MAKING IS ALWAYS NEGATIVE. WHEREAS BREAKING IS ALWAYS A POSITIVE THING. or is it?
you're a distraction to my sleep. to my studies. and to my life.