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does anyone know what temperature saltwater freezes?
- Thread starter fungia
- Start date
Here's a calculator that determines it based on a freezing point depression calculation.
http://www.csgnetwork.com/h2ofreezecalc.html
http://www.csgnetwork.com/h2ofreezecalc.html
thank you guys. outside temperature here can dip below freezing. i notice my chiller comes on even during winter because of the lights and pumps. im thinking that i can plumb some tubing outside to let the outside cold air cool my tank naturally during winter, like the dorm refrigerator diy idea but on a bigger scale. do you think this is a realistic idea?
fungia":ht4yv2ik said:thank you guys. outside temperature here can dip below freezing. i notice my chiller comes on even during winter because of the lights and pumps. im thinking that i can plumb some tubing outside to let the outside cold air cool my tank naturally during winter, like the dorm refrigerator diy idea but on a bigger scale. do you think this is a realistic idea?
That will work fine. I used to use my basement for the same thing.
Under proper conditions when saltwater freezes, the H2O will push out the salt and only the pure H2O will freeze. This is what happens in nature and is why ice burgs are pure water with no salt. However this is because the poles are extremely cold. Typical frosts do not get cold enough for this to happen therefore the water freezes with salt trapped in the ice. Anyways you may not want to do this unless you have some way of controling the temperature.
Not necessarily, some break off of glaciers and somebreak off of the polar caps. I would bet a large percentage of the glaciers and acrtic snow packs are formed from simple snow fall. It snows quite a bit in the arctic. I have seen ships get iced down in Alaska in a matter of hours and have seen the ice pack get a couple hundred miles larger in a week during severe Arctic storms. Most of the Ice I have seen form up there is from freezing spray that the wind picks up off the tops of waves. I can't tell you weather it was salt water or pure water as I did not make a habit of licking icebergs, or the ship I was on for that matter. Come to think of it. I'd bet the pure H2O icebergs are strictly from glaciersGuy":2nr8zkaf said:I thought icebergs were born from glaciers.
Yup, the freezing temperature of seawater is not that straight forward since the state equation of water changes as the salt is left in the solution as the water freezes.
As more and more water freezes, the saltwater get more concentrated until it won't hold the salts anymore and precipate out. Then as the last cluster of salt-free water molecules freeze, it just box up grains of salts.
As more and more water freezes, the saltwater get more concentrated until it won't hold the salts anymore and precipate out. Then as the last cluster of salt-free water molecules freeze, it just box up grains of salts.
But wouldn't you have to take the time to make the salty ice water? :? Or do you just mean mix salt into water with lots of ice cubes in it and then soak the beers in it?JustPhish":cq2m64xa said:Can't believe no one mentioned the myth busters yet. When you want to chill a six pack of beers very quickly, soak them in salty ice water. Works amazingly fast!
blackcloudmedia":pdvziisi said:Also that calculator is using Sodium CHloride as a test solution, the salt we use has a LOT of other salts, i.e. magnesium chloride
Doesn't matter.
With colligative properties, what matters is the concentration of particles, not their chemical identities.
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