WHY DOES SALT MAKE ICE COLDER? LEARN THIS AMAZING PHENOMINA WITH THE HELP OF A SIMPLE EXPERIMENT.
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- Опубліковано 8 вер 2024
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So this explains why salt makes water freeze at a lower temperature, but not why already frozen ice gets colder.
The salt DOES NOT make the ice colder, it makes the water colder! Salt lowers the freezing/melting temperature of the surrounding (now briny) melt water. The remaining ice, likely at -18C from a domestic freezer, melts and cools the salty water to around -8C without it freezing. In the unsalted ice jar the fresh water ice melts to water at 0C as heat is absorbed through the glass.
Yes! Plus.. the thermometer is measuring the temperature of the water, not the ice cube. There is better ‘connection’ between the water and thermometer bulb. In ice cubes, it’s just measuring the temperature of the air around the cubes.
Thank you because that makes a lot more sense. Its not lowering the freezing temp of the ice but the melt water. So by doing that the water is now able to reach a lower temperature while maintaining its liquid form. Because without more energy it cant change forms to make ice. But it can absorb energy from the ice to reach its lowest possible point before hitting that threshold of freezing.
Therefore making the environment colder for a longer time but not making the ice colder. Making the moisture more susceptible to reaching a lower temperature through contact with the remaining ice. So overall the environment is cooler and also last longer.
Is that a good way to interpret what you said? Because if so that makes more sense why we dont put ice down if the roads are already frozen or still frozen. Its just extending the duration of the problem.
You explained that salt makes the freezing point lower, what you didn’t do is explain how something can start at 0 C and drop to -12C all while sitting at room temperature and absorbing heat. Sorry, but your video does not explain the process at all.
Thanks for the feedback. I will try to improve my videos in future 🙂
The salt absorbs the heat from the ice in a endothermic reaction, and it also decreases the freezing/melting point which explains why we put salt on snowy roads! Some ice might turn into liquid but since the salt is absorbing the heat, it makes the water colder to -12 degrees without freezing
@@taliyah8400 if you think absorbing heat, you're usually talking about heat capacity. Heat capacity of a material at say 0 C wont' cool a material to say -10. So there's something else going on here. Sure you can say it changes the freezing point, but so what? Why does that cause a material to drop in temperature all the while there is heat being pumped into the system from ambient (say 20 deg c) surroundings?
@@taliyah8400 oh, and what is the reaction you’re referring to? The dissociation of salt? There isn’t enough mass or moles of salt to cool the system that much. Nor is this dissociation reaction endothermic.
Saying we put it on roads is not explaining the phenomenon that’s occurring.
Salt lowers the freezing point. The ice tends to melt more. Melting is endothermic. So the ice cools.
amazing fact
Nice
Now i know why the ocean doesnt freeze completely
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Wow amazing video
Does this work with seasoning salt?
It all depends on the concentration of actual salt in it.
Thank you for this video! Somebody needed to do it 🍻
Thanks for the appreciation.
I still don’t get it.
The ice is getting colder because it’s some sort of endothermic reaction.
No, there's no chemical reaction going on. See my question and comments at the top.
@@DaveMody good man, I couldn’t find that section.
So you have a bowl at 0C. The room around is is constantly warming it up. Add salt and the ice slushy gets cold… for it to get colder you’d need to pull energy out. Help me understand this.
@@amauta5 Yes, you're asking the right questions. It seems impossible that a warmer ambient surrounding could possibly allow a system to get colder, when there is no endothermic chemical reaction.
@@amauta5 the endothermic reaction is the melting itself. It's forced to melt because the freezing point is lowered, not allowing the ice to stay as a solid.
Why they put salt to snowy roads to melt snow,but they also put salt in ice to make ice cream?
You can watch this video for better understanding: ua-cam.com/users/shortsaECHUTIJL3A?feature=share
Soon I will upload a detailed video on " why we salt on icy roads" so please subscribe to my channel
ua-cam.com/video/xMD8bobotys/v-deo.html
Exactly the same thing is happening in both cases. The salt lowers the freezing point of melt water on the road meaning it turns to water and runs away without refreezing ( unless the weather is extremely cold which makes salt ineffective). In the ice cream experiment the salt lowers the freezing point of the melt water which is retained in the jar in contact with the very cold ice and so is cooled to sub zero without refreezing, this in turn cools the ice cream sufficient to freeze it.
If salt makes the freezing of water difficult
Then why nacl used for clear or melt the snow from roads...??
Sir plz give me the answer
In this video, I have explained why salt melts ice : ua-cam.com/video/xMD8bobotys/v-deo.html
Do let me know when you watch the video
Wow..I just knew it.
Amazing, how salt decrease up to 12 degree C!
Get a light for making video
What kind of salt
Table salt
Nice
Nice
Nice