How is enthalpy related to spontaneity of a reaction?

Answer 1

S > 0 contributes to spontaneity.

Answer 2

S > 0 contributes to spontaneity.

Answer 3

The speed of a given chemical reaction is directly responsible for spontaneity of the reaction. The reaction force and effect is contingent upon the speed of the reaction. The faster the reaction, the more force will be produced.

Answer 4

Enthalpy is one of the factors involved in calculating the Gibbs free energy, which determines the spontaneity of a reaction.

Gibbs free energy change = Enthalpy change - absolute temperature x entropy change.

If the Gibbs free energy change is negative then the reaction is spontaneous. This depends on the balance between enthalpy and entropy changes, and also the temperature. The enthalpy change is negative when the reaction is exothermic, and this obviously favours spontaneity, but it is not sufficient alone.

Answer 5

The change in enthalpy of a reaction (ΔH) is one of the factors that determines the spontaneity of a reaction. A reaction is more likely to be spontaneous if ΔH is negative (exothermic), as the release of heat contributes to increased disorder in the system. Positive ΔH (endothermic) reactions are less spontaneous, as they require energy input to proceed.

Answer 6

H< 0 contributes to spontaneity - apex

Answer 7

H, less than symbol, 0

Answer 8

H

Answer 9

H