ΔSº and ΔHº question


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Chloe Thorpe 1J
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Joined: Fri Sep 28, 2018 12:16 am

ΔSº and ΔHº question

Postby Chloe Thorpe 1J » Wed Feb 20, 2019 5:50 pm

Why can we assume that ΔSº and ΔHº are constant in the Van't Hoff Equation?

Mindy Kim 4C
Posts: 65
Joined: Fri Sep 28, 2018 12:25 am

Re: ΔSº and ΔHº question

Postby Mindy Kim 4C » Wed Feb 20, 2019 5:51 pm

Generally, the change in enthalpy or entropy do not change with temperature. The standard entropies and enthalpies may be different for the compounds, but the change in enthalpy or entropy for the reaction does not vary significantly with change in temperature.

Tuong Nguyen 2I
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Re: ΔSº and ΔHº question

Postby Tuong Nguyen 2I » Wed Feb 20, 2019 6:22 pm

Yes only free energy can be greatly influenced by a change in temperature.

LeannaPhan14BDis1D
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Re: ΔSº and ΔHº question

Postby LeannaPhan14BDis1D » Thu Feb 21, 2019 1:36 am

Free energy is the one that changes and is influenced by temperature

Celio_G_Dis2C
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Joined: Fri Jan 11, 2019 12:16 am

Re: ΔSº and ΔHº question

Postby Celio_G_Dis2C » Thu Feb 21, 2019 1:46 am

T will mostly affect free energy only. One might think that it also changes enthalpy because the addition of heat will change the forward/irreversible reactions of an equation but the change is minimal

Hedi Zappacosta 1E
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Joined: Fri Sep 28, 2018 12:27 am

Re: ΔSº and ΔHº question

Postby Hedi Zappacosta 1E » Thu Feb 21, 2019 11:38 am

The change in delta S and delta H is negligible with a change in temperature so we assume they are constant.


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