Enthalpy of Formation and Reaction

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Semi Yoon
Posts: 60
Joined: Fri Sep 28, 2018 12:27 am

Enthalpy of Formation and Reaction

Postby Semi Yoon » Sun Feb 10, 2019 5:41 pm

When is the enthalpy of formation equal to the enthalpy of the reaction? Is it only when one mole of a product is produced?

Iona Pay
Posts: 43
Joined: Fri Sep 28, 2018 12:15 am

Re: Enthalpy of Formation and Reaction

Postby Iona Pay » Sun Feb 10, 2019 6:01 pm

Yep, that's the main difference! ∆H°, enthalpy of reaction, is the ∆H of the system when all products and reactants are in their standard states. ∆H°f, enthalpy of formation, is the ∆H of the formation of 1 mole of whatever compound when all products and reactants are in their standard states.


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