2. Which of the following statements regarding entropy is true? a) Entropy always decreases in spontaneous processes. b) The entropy of a pure crystalline substance at absolute zero is infinite. c) Entropy is only applicable to reversible processes. d) Entropy is a state function, meaning it only depends on the initial and final state of a system. 3. What is the standard entropy change (AS°) for the reaction below? CO₂(g) → CO(g) + 1/2O₂(g) a) AS° = 0 b) AS > 0 c) AS < 0 d) Cannot be determined without additional information. 4. Which factor(s) affect the entropy of a substance? a) Temperature only. b) Phase only. c) Temperature and phase. d) Enthalpy. 5. What is the formula for Gibbs free energy (AG)? a) AG=AH - TAS b) AG=AH + TAS c) AG=AH/T - AS d) AG=AH-T/AS 6. In a spontaneous process at constant temperature and pressure, which statement is correct? a) AG > 0 b) AG ​