Question

What is the best definition of the enthalpy of reaction, ∆H?A. The energy absorbed or released by a system during a reactionB. The change in the disorder of a system during a reactionC. The energy needed to change a solid into a liquidD. The change in the disorder of a system when a solid melts

Answer 1

A

Step-by-step explanation:

Answer 2

Option A. The energy absorbed or released by a system during a reaction.

Explanations:

The nature of a reaction is determined by the value of its enthalpy change. It determines whether a reaction is endothermic (energy absorbed from the surrroundings) or exothermic (energy released by a system).

Based on the concept above, we can conclude that the best definition of the enthalpy of reaction is the energy absorbed or released by a system during a reaction.