## Enthalpy of formation vs reaction enthalpy

Jessica Lutz 2E
Posts: 56
Joined: Fri Sep 29, 2017 7:04 am

### Enthalpy of formation vs reaction enthalpy

What is the difference in the definition between enthalpy of formation and reaction enthalpy?

Morgan Baxter 1E
Posts: 50
Joined: Thu Jul 27, 2017 3:00 am

### Re: Enthalpy of formation vs reaction enthalpy

I believe that the enthalpy of formation is a type of reaction enthalpy. Every formation reaction is a reaction, but not every reaction is a formation reaction. Therefore, enthalpy of formation is just one example of reaction enthalpy.

Britney Alvey 1B
Posts: 31
Joined: Fri Jun 23, 2017 11:39 am

### Re: Enthalpy of formation vs reaction enthalpy

Reaction enthalpy is the change in heat that occurs when a reaction takes place. To calculate this, you would add the different $\Delta H$ 's of each reaction that took place in order to form the product, i.e. Hess's Law. The enthalpy of formation is the change in enthalpy when an element in its standard state reacts to form a product that is a compound.

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