Enthalpies

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Lindsey Chheng 1E
Posts: 110
Joined: Fri Aug 30, 2019 12:16 am

Enthalpies

Postby Lindsey Chheng 1E » Tue Jan 28, 2020 10:26 pm

Can someone help to explain the difference between standard enthalpy of reaction and standard enthalpy of formation?

AArmellini_1I
Posts: 107
Joined: Fri Aug 09, 2019 12:15 am

Re: Enthalpies

Postby AArmellini_1I » Tue Jan 28, 2020 10:35 pm

Standard reaction enthalpy is the enthalpy of the P and R at their most stable point. Standard enthalpy of formation is the summation of all the R and P standard reaction enthalpy [I think but I may have messed this up]

Alice Ma 2K
Posts: 52
Joined: Wed Nov 13, 2019 12:26 am

Re: Enthalpies

Postby Alice Ma 2K » Tue Jan 28, 2020 11:39 pm

The standard enthalpy of formation is the enthalpy change between the elements in their standard state (reactants) and the compounds (products). The standard enthalpy of reaction is the heat given off or taken up for the reaction, in other words, the enthalpy difference between the reactants and the products.

Minh Ngo 4G
Posts: 137
Joined: Thu Jul 25, 2019 12:17 am

Re: Enthalpies

Postby Minh Ngo 4G » Tue Jan 28, 2020 11:45 pm

Standard enthalpies of formation is when all the R are in their most stable state, forming P

gabbymaraziti
Posts: 111
Joined: Wed Sep 18, 2019 12:19 am

Re: Enthalpies

Postby gabbymaraziti » Wed Jan 29, 2020 7:23 pm

The standard enthalpy of formation is the change in enthalpy that accompanies the formation of one mole of a compound from its elements. The standard enthalpy of reaction is the change in enthalpy that occurs in a system when one mole of matter is transformed by a chemical reaction.


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