## Non spontaneous to spontaneous process?

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

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

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

205192823
Posts: 100
Joined: Wed Sep 18, 2019 12:19 am

### Non spontaneous to spontaneous process?

Can a non spontaneous process with a positive delta S become spontaneous if the temperature is increased (assuming that delta H and delta S are both independent of temperature)?

BritneyP- 2c
Posts: 101
Joined: Sat Sep 14, 2019 12:15 am

### Re: Non spontaneous to spontaneous process?

If the process has a high delta S and a high delta H, it can become spontaneous with a high temperature.

MinuChoi
Posts: 100
Joined: Wed Sep 18, 2019 12:15 am

### Re: Non spontaneous to spontaneous process?

Given the above statements are true:
deltaG = deltaH - T*deltaS.
If deltaS > 0, then T*deltaS is positive. Increasing T means that T*deltaS becomes larger, but it is subtracted. So deltaG would be decreasing as T increases. If your deltaG is positive before you start increasing temperature, then there will be a higher temperature where deltaG will decrease past zero (become spontaneous).