Question

What is enthalpy of a reaction? Explain the standard enthalpy of a reaction?

Answer 1

The standard enthalpy of formation is the change in enthalpy that accompanies the formation of one mole of the compound from its elements. The standard enthalpy of reaction occurs in a system when one mole of matter is transformed by a chemical reaction.

Answer 2

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It is the change in enthalpy that accompanies a chemical reaction represented by a balanced chemical equation.

$ΔH _{r} = ΣH _{(Ꮲ )} - ΣH _{(Ꭱ)}$

Standard Enthalpy of a reaction:

Enthalpy of reaction expressed at the standard state condition is called standard Enthalpy of a reaction.(ΔH)

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