## Spontaneous

$\Delta S = \frac{q_{rev}}{T}$

Erik Buetow 1F
Posts: 96
Joined: Fri Aug 30, 2019 12:15 am

### Spontaneous

When we talk about a spontaneous reaction being favorable, what exactly does that mean?

Eugene Chung 3F
Posts: 142
Joined: Wed Nov 15, 2017 3:03 am

### Re: Spontaneous

Generally, reactions are favorable when they result in a decreased enthalpy and increased entropy of the system. When the reaction both decrease enthalpy and increase entropy, it occurs natually.

Anna Chen 1K
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Joined: Thu Jul 25, 2019 12:18 am

### Re: Spontaneous

Spontaneous, or favorable, reactions favor the formation of products over reactants and have a negative value in delta G. A reaction's overall entropy, or disorder, also increases.

chrisleung-2J
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### Re: Spontaneous

Reactions are favorable when they increase entropy and decrease enthalpy for the system, and favorable reactions tend to be spontaneous

IScarvie 1E
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Joined: Sat Aug 17, 2019 12:16 am

### Re: Spontaneous

For a simpler example, ice melting to water at room temperature is favorable (low enthalpy high entropy), but water freezing into ice is not.