Will dissolving a salt in water affect the entropy of the water?

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Kevin Tabibian 1A
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Joined: Fri Sep 29, 2017 7:06 am

Will dissolving a salt in water affect the entropy of the water?

Postby Kevin Tabibian 1A » Wed Feb 07, 2018 7:31 pm

If I were to dissolve a salt in water by stirring it (let's say NaCl), will I be affecting the entropy of the water that surrounds it

Curtis Tam 1J
Posts: 105
Joined: Thu Jul 13, 2017 3:00 am

Re: Will dissolving a salt in water affect the entropy of the water?

Postby Curtis Tam 1J » Wed Feb 07, 2018 10:57 pm

Well since this is an endothermic process, I believe some heat would be taken away from the water surrounding the salt. But I'm not sure if this value is even important since I would assume the majority of the change of entropy of the dissolution would be calculating the change in positional entropy, which shouldn't affect the water.

Mitch Walters
Posts: 45
Joined: Fri Sep 29, 2017 7:07 am

Re: Will dissolving a salt in water affect the entropy of the water?

Postby Mitch Walters » Wed Feb 07, 2018 11:53 pm

If you're adding particles wouldn't that increase the entropy?

Mitch Walters
Posts: 45
Joined: Fri Sep 29, 2017 7:07 am

Re: Will dissolving a salt in water affect the entropy of the water?

Postby Mitch Walters » Wed Feb 07, 2018 11:54 pm

Wait new thought, if you're taking a solid and adding it to water, then the entropy would increase, because you now you have an aqueous solution.


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