Answer:
c. The overall reaction reduces entropy (products have less entropy than reactants).
Step-by-step explanation:
The free energy change (delta G) for a reaction must have a negative value to allow the reaction to occur spontaneously. Free energy change depends on entropy (S) and enthalpy (H) of the reaction.
ΔG = ΔH - T ΔS. If a reaction has positive enthalpy change and an overall increase in entropy, the reaction has negative free energy change and occurs spontaneously. However, if a reaction with positive enthalpy change has an overall reduction in entropy, the reaction will have a positive value of free energy change and cannot occur spontaneously.