Question

If g < 0 for a reaction at all temperatures, then h is _________ and s is _________?

1) positive, positive
2) positive, negative
3) negative, positive
4) negative, negative

Answer 1

If g < 0 for a reaction at all temperatures, then h is positive and s is positive.

Step-by-step explanation:

In a reaction where g < 0 at all temperatures, it means that the Gibbs free energy change is negative. This indicates that the reaction is spontaneous and will proceed in the forward direction (from reactants to products).

For the enthalpy (h) and entropy (s) of the reaction:

1. If h > 0, it means the enthalpy change is positive, implying an endothermic reaction.
2. If s > 0, it means the entropy change is positive, indicating an increase in the disorder or randomness of the system.

Therefore, the correct answer is 1) positive, positive.