## Entropy Concept

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

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

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

nelms6678
Posts: 53
Joined: Fri Sep 29, 2017 7:07 am

### Entropy Concept

Does an endothermic reaction have the ability to increase spontaneity and entropy in reaction?

Sirajbir Sodhi 2K
Posts: 47
Joined: Sat Jul 22, 2017 3:00 am

### Re: Entropy Concept

An endothermic reaction can certainly increase the total entropy of a system. That's why certain endothermic processes are spontaneous: the dissolution of salt in water for example. Remember, this is possible because spontaneity is a function of total entropy, not just the entropy of a system (this phenomenon can also be explained through Gibbs Free Energy at constant temperature and pressure).

As for your other question, a reaction always proceeds to minimize Gibb's Free Energy (toward equilibrium).

aaron tang 2K
Posts: 49
Joined: Thu Jul 27, 2017 3:01 am

### Re: Entropy Concept

Endothermic reactions/processes are spontaneous because this kind of process absorbs heat which increases the total entropy of a system.