## 4J3 7th Edition

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

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

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

Nico Edgar 4L
Posts: 32
Joined: Fri Sep 28, 2018 12:19 am

### 4J3 7th Edition

For this problem, do we use the enthalpy and entropy of vaporization for NH3? I seem to be getting the incorrect answer and am not sure why.

2c_britneyly
Posts: 62
Joined: Fri Sep 28, 2018 12:16 am

### Re: 4J3 7th Edition

Yes, you use the enthalpy and entropy given in the tables. Check your units. They usually give enthalpy in kJ and entropy in J, so it's possible you forgot to convert.