## How can a change in entropy be negative?

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

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

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

John_Richey_4A
Posts: 69
Joined: Fri Sep 28, 2018 12:27 am

### How can a change in entropy be negative?

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Marcela Udave 1F
Posts: 66
Joined: Fri Sep 28, 2018 12:16 am

### Re: How can a change in entropy be negative?

If there is less disorder in a system, then entropy is negative.

Tuong-Minh Tran 1C
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Joined: Fri Sep 28, 2018 12:19 am

### Re: How can a change in entropy be negative?

A change in entropy can be negative if energy is able to escape the system. Technically, in the universe, entropy is always increasing, but if we only consider the earth as a system, then entropy can decrease.

Henry Dudley 1G
Posts: 61
Joined: Fri Sep 28, 2018 12:16 am

### Re: How can a change in entropy be negative?

An example of this would be a liquid being cooled into a solid. The molecules have less possible positions and therefore have less entropy leading to a decrease in entropy or negative entropy change.