Gibbs Free Energy (18.3.1)

Question 1

• Spontaneity depends on change in enthalpy (∆H) and change in entropy (∆S).

Answer 1

• Spontaneity depends on change in enthalpy (∆H) and change in entropy (∆S).

Question 2

• Gibbs free energy change (∆G) is a thermodynamic state function that combines enthalpy and entropy, and reflects the spontaneity of a reaction. ∆G = ∆H – T∆S.

Answer 2

• Gibbs free energy change (∆G) is a thermodynamic state function that combines enthalpy and entropy, and reflects the spontaneity of a reaction. ∆G = ∆H – T∆S.

Question 3

• When ∆G < 0, the forward reaction is spontaneous.
When ∆G > 0, the reverse reaction is spontaneous.
When ∆G = 0, the reaction is at equilibrium.

Answer 3

• When ∆G < 0, the forward reaction is spontaneous.
When ∆G > 0, the reverse reaction is spontaneous.
When ∆G = 0, the reaction is at equilibrium.