Henrys Law: A physical description
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- เผยแพร่เมื่อ 28 ม.ค. 2014
- A Physical Desription of Henry's Law and the Solubility of a Gas in a Liquid.
Table of Contents:
00:00 - Henry's law
00:18 - What Dissolves in a Liquid Solvent?
01:26 - What's Over the Liquid?
02:47 - Why Did the Gas Dissolve?
04:12 - What Effects the Solubility?
05:59 - Henry's Law
07:05 - Summary of Henry's Law Equation
08:08 - Self Assessment on Henry's Law
Perfect Student-Orientade Presentation for Excellent Understanding of Us. :)
amazing lecture
Really really good, thanks a lot ! It def. helped :)
Nice explanations thanks
Thank you so much man!
Well done man
awessome lecture GREAT!!!!!!!!!!!!!!!!!!!!!
Outstanding tutorial -kudos!
Glad you liked it!
found this more helpful thn Khan Academy
Great!!
amazing
hello! everyone, can u guys help me which gas can soluble with 2 acetyl-pyrroline.Thanks
Co2
Thanks man
My pleasure!
Answers for self assessment please, especially for 4th question. Great video anyways!!
It increases with increasing temperature, .... increases the interaction.
@@felixfelix2923 the opposite is true. increasing temperature will result in gas molecules escaping the solution hence reducing the solubility.
I want to know that how the solubility of gas increases with increase in pressure.
The equation tells you exactly how it works. Solubility of the gas = a constant multiplied by the pressure. If the pressure increases, the right hand side of the relationship increases. Thus, the left hand side must increase as well to maintain the equality.
@@EricZuckerman1 i wanted to know the physical process and not by the formula. Like the gas comes closer.....
The video discusses exactly “why” the relationship exists. In short, it’s not about “being closer” but more collisions. When the pressure of the gas increases above the liquid, that means there are more collisions with the surface of the liquid. More collisions means there is an increased chance that the IMFs between the liquid and the gas will be effective in holding the gas particle within the liquid (thus being dissolved).
They key is that pressure is increased in only two ways: hitting the container walls with more force (temperature increase) OR hitting the walls of the container more often (more particles added OR volume is reduced). Henry’s law is usually considered at a constant temperature, so the pressure increase is almost always due to more particles or a decreased volume.
Hope this helps.
@@EricZuckerman1 thankyou so much sir.
I don't get it .. my teacher defined a solution as a **homogeneous** mixture of two different substances .
Homogeneous is a term that describes a mixture as having the same properties throughout. Since it's a mixture, a homogeneous mixture is composed of more than one substance. However, what we see and measure and experience from the mixture is the same everywhere in the mixture.
A cola is an example of a mixture that is homogeneous. Each tiny little mL of a 350 mL can of cola would look alike, taste alike, feel alike, etc.
The same cannot be said for fruit salad. The salad is a mixture, made of several different fruits. But, each spoonful of the salad might have different amounts of any one ingredient. For example, one bite of the salad might include a slice of banana, but the next might contain two or zero or three slices. The point is, the composition of the salad is inconsistent, so we characterize it as a heterogeneous mixture.
Eric Zuckerman I got it sir thank you 😀
It seems that the liquid is also dissolving into the gas.
While it may seem so, that would not be technically correct. The solvent is the substance in a mixture that exists in the overwhelmingly larger mole ratio. For dissolved gasses, the % liquid is routinely greater than 99% of the mixture.
Also, the liquid in this case stays in the condensed phase and is mainly acting like a pure liquid (with slightly altered physical properties). Meanwhile, the properties of the gas are greatly altered to the extent that it is no longer in the gaseous state at all and its properties are more in line with the solvent.
@@EricZuckerman1 I'm not sure you followed my thinking; that two substances in contact have a symmetrical process of dissolving some of their mass into the other: some liquid into the gas, and some gas into the liquid. This might be more obvious in different situations, like soldering or especially brazing where the boundary transition between the two substances is more gradual, including a brane of 50/50 solution, allowing the gradual alloying of structural characteristics to provide a stronger bond between the two masses after the transition solution freezes.
@@you2tooyou2too As the video is specific to Henry's Law, the concept is centered around how the gas pressure is related to the dissolved gas within the solvent. The video is also an introductory level discussion, so I definitely don't go to more complicated models.
To deal with two partially miscible liquids, a different analysis would need to be done. Certainly, there is quite a difference when the chemical potential of the substances are closer in value and have more similar dependencies on T and P. I must admit, I am not well versed in that area. Thanks for the Interesting insights!!