Gibbs free energy Flashcards
When does Gibbs free energy apply
at constant temperature and pressure
when does helmholtz energy apply
at a constant temperature and volume
for isolated systems, when is ∆S spontaneous
when ∆S>0
for isolated systems, when is ∆S nonspontaneous
when ∆S<0
when ∆S sys + ∆S surr >0
it is spontaneous
when ∆S sys + ∆S surr <0
it is non spontaneous
when ∆S sys + ∆S surr =0
it is at equillibrium
why can we use ∆G to predict spontaneity
we can focus on the system properties and see how they affect spontaneity
when ∆G<0 it is
spontaneous
when ∆G>0 it is
non spontaneous
when ∆G=0 it is
at equillibrium
when ∆A<0 it is
spon
when ∆A>0 it is
non-spon
when ∆A=0 it is
at equillibrium
what does ∆A= ∆G-RT∆ng represent
it represents the total work of the reaction where -RT∆ng is the PV work and ∆G is the non PV work
