Standard Enthalpy of Formation Course Reader example

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Jamie_Cole_2N
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Joined: Wed Sep 21, 2016 2:58 pm

Standard Enthalpy of Formation Course Reader example

Postby Jamie_Cole_2N » Sun Jan 22, 2017 10:50 pm

On page 17 of the course reader, there is a standard enthalpy of formation example about using graphite and gaseous hydrogen and oxygen to form ethanol,
Why is the enthalpy of reaction divided by 2?

April Z 1K
Posts: 10
Joined: Fri Jul 22, 2016 3:00 am

Re: Standard Enthalpy of Formation Course Reader example

Postby April Z 1K » Sun Jan 22, 2017 11:39 pm

The standard reaction enthalpy is divided by 2 because the example is looking for the formation of 1 mole of CH3CH2OH, whereas the rxn enthalpy gives the kJ amount for 2 moles of CH3CH2OH. Hope this helps.


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