Hess's Law

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Sammy Thatipelli 1B
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Hess's Law

Postby Sammy Thatipelli 1B » Wed Feb 14, 2018 11:19 pm

What is the property of enthalpy that allows us to use Hess's Law?

Thu Uyen Tran 1B
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Re: Hess's Law

Postby Thu Uyen Tran 1B » Wed Feb 14, 2018 11:27 pm

Enthalpy is a state function/property.

Jenny Cheng 2K
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Re: Hess's Law

Postby Jenny Cheng 2K » Thu Feb 15, 2018 11:29 am

Enthalpy is a state function, meaning you can calculate the desired value from the final and initial conditions, and you can also add components to reach the desired value. Hess's Law uses the fact that enthalpy is a state function to calculate ΔH.

Manvir2K
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Re: Hess's Law

Postby Manvir2K » Thu Feb 15, 2018 12:35 pm

Since Enthalpy is a state function, it has an additive property. It does not matter what path was taken to reach the destination.

Sophie Krylova 2J
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Re: Hess's Law

Postby Sophie Krylova 2J » Thu Feb 15, 2018 1:20 pm

So you could apply Hess' law for gibbs free energy too, since it's a state property?

Lorie Seuylemezian-2K
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Re: Hess's Law

Postby Lorie Seuylemezian-2K » Thu Feb 15, 2018 3:13 pm

Yes you can! You don't call it hesss law but the same theory is used to make similar calculations


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