The relation between deltaH and deltaU (enthalpy and internal energy)

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Sophia Kim 1C
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The relation between deltaH and deltaU (enthalpy and internal energy)

Postby Sophia Kim 1C » Tue Jan 23, 2018 11:58 pm

In the textbook it said that reaction enthalpy (deltaH) is more positive (less neg) than the reaction internal energy for reactions that generate gas. The book gives an explanation but I have trouble understanding it!

Chem_Mod
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Re: The relation between deltaH and deltaU (enthalpy and internal energy)

Postby Chem_Mod » Wed Jan 24, 2018 7:09 am

Hi, Sophia,
Remember that deltaH= delta U+deltan(gas) RT. When delta n is positive (more gas is forming) you have this additional variable to account for and therefore delta H becomes larger than delta U.


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