Gibbs energy Flashcards
Does the Gibbs energy equation use S(surr)
No, only S(sys)
What is Gibbs energy used for
Predicting the spontaneity of a process
If Delta G is negative
The process is Spontaneous
If Delta G is positive
The process is Nonspontaneous
if Delta G is zero
The process is at equilibrium
When Delta H is negative and Delta S is positive, Delta G will be
Negative (spontaneous)
When Delta H is positive and Delta S is negative, Delta G will be
Positive (nonspontaneous)
When Delta H and S are negative, Delta G will be
Negative when T*S is < H (spontaneous at Low T)
Positive when T*S is > H (spontaneous at High T)
When Delta H and S are positive, Delta G will be
Negative when T*S > H (spontaneous at High T)
Positive when T*S < H (nonspontaneous at Low T)
What is Delta G^o / G(rxn)
Standard Gibbs energy of reaction
If Delta G^o is negative
formation of products are favored
if Delta G^o is positive
formation of reactants are favored
