The chemistry of cold packs - John Pollard
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Date: 2020-08-22
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Comments and reviews: 8
DEEKSHANT
I don't understand the concept of dissolving, the video told- the force of attraction is not enough to bind the molecules of the solute, and also the vibrations of molecules overcome the attractive force. and thus. it dissolves. But it doesn't make sense as if you put that solute in air or in any medium the force of attraction would the same and also the vibrations of molecules (if temp. Is taken constant ) this means the particles would always overcome the force of attraction and dissolve in any medium, but that's not the case (e. g. oil in water. I REALLY don't understand the concept of dissolving. What is dissolving. plz do reply
This curiosity is eating me.
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I don't understand the concept of dissolving, the video told- the force of attraction is not enough to bind the molecules of the solute, and also the vibrations of molecules overcome the attractive force. and thus. it dissolves. But it doesn't make sense as if you put that solute in air or in any medium the force of attraction would the same and also the vibrations of molecules (if temp. Is taken constant ) this means the particles would always overcome the force of attraction and dissolve in any medium, but that's not the case (e. g. oil in water. I REALLY don't understand the concept of dissolving. What is dissolving. plz do reply
This curiosity is eating me.
reply
Hassan
For all those who didn't understand.
The reaction between Water and Ammonium Nitrate is an Endothermic Reaction. This means energy is absorbed from the surroundings, causing the temperature to fall. As the energy barrier is low, the reaction happens quickly.
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For all those who didn't understand.
The reaction between Water and Ammonium Nitrate is an Endothermic Reaction. This means energy is absorbed from the surroundings, causing the temperature to fall. As the energy barrier is low, the reaction happens quickly.
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Vinay
1: 26 Everyone he said known stars
means only known stars not all stars
Well I not for everyone I know many people know what he said
Yeah I know that he said that after one second of 1: 26 but try it 1: 27 and you will only listen stars not known
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1: 26 Everyone he said known stars
means only known stars not all stars
Well I not for everyone I know many people know what he said
Yeah I know that he said that after one second of 1: 26 but try it 1: 27 and you will only listen stars not known
reply
blackrose914
Now for the broke-college-student question: can I reuse cracked cold packs by just putting them in the freezer? What's the worst that can happen. I suspect the Do not reuse warning is just a way of selling more product: /
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Now for the broke-college-student question: can I reuse cracked cold packs by just putting them in the freezer? What's the worst that can happen. I suspect the Do not reuse warning is just a way of selling more product: /
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Tuxedo
I like the animation but this was kinda confusing, I knew what entropy was but not energetics before this video, and I still understood neither explanation in the video.
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I like the animation but this was kinda confusing, I knew what entropy was but not energetics before this video, and I still understood neither explanation in the video.
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Daria
The animation is cute, but not helpful. It strays so far away from actual diagrams/descriptions that the concepts become really abstract.
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The animation is cute, but not helpful. It strays so far away from actual diagrams/descriptions that the concepts become really abstract.
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Lihgg
so what your saying is i have to disable a moving breathing ice pack by snapping its neck to make it cold then force it on my skin?
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so what your saying is i have to disable a moving breathing ice pack by snapping its neck to make it cold then force it on my skin?
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Minolca
I don't have r to be a great way of the day of school for a long way day and the only thing that is the best of luck today hgggg
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I don't have r to be a great way of the day of school for a long way day and the only thing that is the best of luck today hgggg
reply
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