Delta G,S,H

Negative Delta G

spontaneous; kJ/mole

Positive Delta G

non-spontaneous; kJ/mole

positive delta H and negative delta S

never spontaneous

negative delta H and positive delta S

always spontaneous

Positive delta H and positive delta S

spontaneous at high temperatures

negative delta H and negative delta S

spontaneous at low temperatures

If Delta G (no naught) 0

K=1 and E=0

If delta G (no naught) negative

K>1, products favored; E= +

If delta G (no naught) positive

K

Delta S negative

More disorder (Favored Condition); Units J/K x mole ... Entropy

Delta S positive

Less disorder; Units J/K x mole ... Entropy

Delta H

Enthalpy of formation (kJ/mole), Hess' Law

Delta H positive

Reaction endothermic and heat energy added (kJ/mole)

Delta H negative

Reaction exothermic and heat is lost from the system (kJ/mole)