## Calculation methods

$\Delta G^{\circ}= \Delta H^{\circ} - T \Delta S^{\circ}$

$\Delta G^{\circ}= -RT\ln K$

$\Delta G^{\circ}= \sum \Delta G_{f}^{\circ}(products) - \sum \Delta G_{f}^{\circ}(reactants)$

Payton Schwesinger 1J
Posts: 45
Joined: Fri Sep 29, 2017 7:04 am

### Calculation methods

For the equation deltaG = deltaH - delta(TS), when calculating the standard enthalpy of the reaction, can you also use Hess's law or mean bond enthalpies? Professor Lavelle mentioned using standard enthalpies of formation in class but not the other two methods so I wasn't sure.

Vivian Nguyen
Posts: 66
Joined: Fri Sep 29, 2017 7:04 am
Been upvoted: 2 times

### Re: Calculation methods

Yes, I think you can use them! I also wrote in my notes that Professor Lavelle mentioned the various methods of calculating delta H.

Jimmy Zhang Dis 1K
Posts: 30
Joined: Fri Sep 29, 2017 7:05 am

### Re: Calculation methods

Yes, I believe that you can use any of the methods we have previously learned to calculate delta H

Marina Georgies 1C
Posts: 30
Joined: Sat Jul 22, 2017 3:00 am

### Re: Calculation methods

It would make sense seeing as they as both state functions so you're probably right!

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