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[jane_ni_2d]

What is a standard reaction enthalpy?

[jessicahe4Elavelle]

Standard enthalpy of reaction is the enthalpy change that occurs in a system for a reaction in which it’s reactants and products are in their standard state.

[Amar Singh]

You can just think of it as the normal enthaply, except when the conditions of the reactants and products are in the standard state. So it must be in 1 bar and pure states of elements.

[Diana Bibireata 1B]

The standard reaction enthalpy is just the enthalpy when all reactants and products are in their standard state at 1 atm.

[Mark 1D]

enthalpy of standard state for reactants and products (which are in their standard states)

[jocelyntzeng]

is standard state at 1 bar or 1 atm