Entropy


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Rhea Shah 2F
Posts: 97
Joined: Thu Jul 25, 2019 12:17 am

Entropy

Postby Rhea Shah 2F » Sun Mar 15, 2020 11:54 pm

Can we use the van't hoff equation to calculate entropy, or would we use a different equation to calculate entropy over a temperature change?

Chris Tai 1B
Posts: 102
Joined: Sat Aug 24, 2019 12:16 am

Re: Entropy

Postby Chris Tai 1B » Mon Mar 16, 2020 12:13 pm

This depends on which form of the Van't hoff equation you're using. You can use the van't hoff equation to indirectly solve for the enthalpy of a reaction over a given temperature range, since the equation relates two different equilibrium constants at two different temperatures with there being a factor of deltaH/R.
However, you could also use the form of the equation that relates one equilibrium constant to a reaction at a singular temperature, in which you're also able to solve for the entropy at that given temperature.
ln(K) = -deltaH/RT + deltaS/R

Ayushi2011
Posts: 101
Joined: Wed Feb 27, 2019 12:17 am

Re: Entropy

Postby Ayushi2011 » Mon Mar 16, 2020 6:09 pm

I would calculate deltaH and then use deltaG = deltaH - TdeltaS to find entropy.


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