Which of the following statements are correct regarding Gibbs free energy?
1. Gibbs free energy is used to determine the spontaneity of a reaction.
2. If ΔG is positive, the reaction is non-spontaneous.
3. Gibbs free energy is independent of temperature and pressure.
4. ΔG = ΔH - TΔS at constant temperature.
1
1, 2, and 3
2
1, 2, and 4
3
2, 3, and 4
4
1, 3, and 4