## Review Problem for Week 10 #5

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

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

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

305421980
Posts: 101
Joined: Sat Sep 07, 2019 12:16 am

### Review Problem for Week 10 #5

When is delta G formation zero?

MingdaH 3B
Posts: 133
Joined: Thu Jul 11, 2019 12:17 am

### Re: Review Problem for Week 10 #5

you'll almost always get delta G formation in a problem, but its usually zero for molecules that are already in their lowest energy states, such as diatomic noble gases.

Diana A 2L
Posts: 106
Joined: Sat Aug 17, 2019 12:16 am
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### Re: Review Problem for Week 10 #5

You should generally know the molecules for which delta G of formation is zero (the same molecules for which delta H of formation is zero at their standard states).

Maya Gollamudi 1G
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

### Re: Review Problem for Week 10 #5

Similar to delta H of formation, delta G of formation is 0 for elements and diatomic gases like Cl2.