Hess Law

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Gabriela Carrillo 1B
Posts: 53
Joined: Fri Sep 29, 2017 7:04 am

Hess Law

Postby Gabriela Carrillo 1B » Mon Jan 15, 2018 10:06 pm

When manipulating reactions using Hess's Law I know you can multiply the rxn and deltaH by the coefficient needed to become equivalent to the desired rxn. Can you also divide both to obtain the desired rxn??

AtreyiMitra2L
Posts: 169
Joined: Fri Sep 29, 2017 7:03 am
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Re: Hess Law

Postby AtreyiMitra2L » Mon Jan 15, 2018 10:07 pm

Yes you can! These properties are all possible because enthalpy is a state function. In other words, it doesnt matter how it got there. The end result will still be the same.

Ramya Lakkaraju 1B
Posts: 67
Joined: Fri Sep 29, 2017 7:03 am

Re: Hess Law

Postby Ramya Lakkaraju 1B » Tue Jan 16, 2018 10:06 pm

In state properties, the path taken does not matter; only the final and initial values matter when doing calculations related to state properties.

RyanTran2F
Posts: 44
Joined: Thu Jul 27, 2017 3:00 am

Re: Hess Law

Postby RyanTran2F » Tue Jan 16, 2018 11:03 pm

You can also think of it as multiplying the equation and enthalpy values by a fraction (ex. multiplying by 1/2 is same as dividing by 2) so this is a valid technique

Leanne Wong 1H
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Re: Hess Law

Postby Leanne Wong 1H » Wed Jan 17, 2018 4:44 pm

Yes, you can because enthalpy is a state function.


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