Free Energy of Dissolution

We've learned a lot about solution chemistry, and we've also learned about thermodynamics and spontaneity. So what about the spontaneity associated with dissolution? If an ionic solid dissolves in water, is this an enthalpically or entropically driven process? Let's do some math and find out!
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[@glennpearson9348]

Gibbs free energy! Ah, back to the basics! I really enjoyed thermodynamics in college. Everyone thought I was nuts. Thanks for the refresher, Professor Dave, and keep up the great work!

[@jbirdmax]

Always something interesting and educational here. Even learned a little in the Flatderpia debunk (annihilation) videos.

[@MaryAnnNytowl]

Sadly, they didn't get annihilated, as they still exist. 😒

[@jbirdmax]

Yea haha. It’s like a kid with two black eyes in a fight. He’ll never learn. He’s already been told twice and still fighting.

[@juidude634]

Thanks again Dave! I allmost understand this "stuff"🙏🏻✌🏻🇫🇮

[@urlocalnerdryan4950]

The intro never gets old

[@cpt-cheese3489]

Such a banger

[@200Carl]

And stays in your head afterwards lol

[@urlocalnerdryan4950]

@@200Carl fr lol

[@meowscles1804]

Let's go I love science and these science stuff especially proffesor Dave

[@MaryAnnNytowl]

There's a little bit of everything available on your channel, which is very nice. 😊

[@wyrmofvt]

4:12 Just thought of this, but in this case the temperature, T, can be low enough such that ∆H > T∆S, and as such that the deposition of salt back onto the crystal lattice will be spontaneous.

[@loveblowsbad]

How cold? Quantum computer cold? High temperature Superconducting cold? If it's an achievable number that should warrant an experiment...

[@wyrmofvt]

​@@loveblowsbad Room temperature, provided a supersaturated salt solution. ∆S depends on how much salt is already in solution; if there's already a lot, more going into solution won't increase entropy that much. Thus, if you lower the temperature of a salt solution that's already pretty loaded, then T∆S will drop to a point where it is no longer entropically favorable to dissolve more salt, and salt will stop spontaneously dissolving - the solution has become saturated. Drop the temperature more, and the solution becomes supersaturated - it now becomes more entropically favorable for salt to come out of solution into a precipitate.

[@boogieboss]

Dave is my favorite mystic 🧙‍♂️

[@ElPurroco]

Now that s what I like about professor Dave , chemistry understanding , yeah .....

[@godzillaworks4585]

0:13 *change da world; my final message; goodbye*

[@muhammadnawazuddin5796]

Very thankful to you professor Dave ...

[@stepho7475]

The solubility of sodium chloride in H2O is actually one rare example which is nearly isothermal compared to other salts. At around 100°C water temperature around 40 g of NaCl can be mixed in water while at 25°C you can dissolve 30 g of NaCl. Even a simple system like sodium chloride can be complex to understand.

[@kailashrwt5806]

Nice 👍👍

[@S1nwar]

in the case of road salt: is the G released as heat partially responsible for melting the ice or is it JUST the unintuitive reduction of the melting point of saline solution that melts the ice?

[@BioTechproject27]

I'd say the energy released is negligible here, simply because that energy released is easily lost to the water which can store and conduct a lot of energy, what would make more sense is that the ions "mess up" the crystal formation of water, so the temperature has to be even lower to make the water crystallize (releasing energy) and shove out the ionic compound, which also would require energy.

[@Fava_beans]

Hi Professor, would you please make more content for medical-related subjects like pharmacology and pathology? Thank you.

[@ProfessorDaveExplains]

I have a pharmacology series! Pathology coming soon.

[@mg42sd]

Putting "Free Energy" in the title baited me so hard! I was hoping for another good debunk video.

[@sciencenerd7639]

Thank you

[@rebeccaarroyo267]

more kinetics and equilibrium videos

[@gregedmand9939]

Professor Dave: can you address the subject of David Adair?

[@sarmadrkabi5361]

Just question when delta G negative so there is energy release as i understood so in which shape this energy liberated

[@richardscott982]

Is this related to the latent heat of evaporation? Just found your channel, SO many questions 😂

[@lukelblitz3627]

Hey Dave,i have to ask I never had a proper education past school. Which series would you recommend i watch to brush up on what little i remember?

[@ProfessorDaveExplains]

I've got everything you need here!

[@lukelblitz3627]

@@ProfessorDaveExplains that's great to know!do you have any recommendations on which series you made i should take some time to check?

[@ProfessorDaveExplains]

Depends what you wanna know, just check out my home page and see what I have.

[@thecreatomaticboy354]

Hello, love ur vids, im 13

[@gzunfariqbalgazanivlogs7197]

Super

[@azmanabdula]

Chlorine gas though right?

[@ProfessorDaveExplains]

Hm?

[@azmanabdula]

@@ProfessorDaveExplains I was drinking I cannot remember what my point was

[@hermannpaschulke1583]

Free Energy??? 😳

[@MaxDiscere]

FREE ENERGY CONFIRMED👀?! lol

[@vickonstark7365]

👍🏼

[@VectoorX]

My brain

[@castlevice7449]

Hi, I'm not the sharpest tool in the shed, can you explain why it's dark in space if the sun is so light. Sadly I no nothing about science.

[@ProfessorDaveExplains]

Well it's bright in the direction of the sun. But the omnidirectional brightness of daytime on Earth occurs because atmospheric particles scatter the light.

[@-JA-]

Thank you