Does Salt Extend Block Ice Life?????

jack
i would think that the paper its self would act as an insulator & slow the process of melting down as to the salt im not sure other than that salt will not freeze & is actualy exclued in the freezing process if my chemistry lessons serve my memory right, which is why all the ice at the poles is made up of fresh water, try sprinkiling salt on an ice block & place one unsalted next to it be interesting to see which melts first
Regards BruceBudget Signs

A salt water ice block will freeze at a lower temperature depending on how much salt you add. The downside is it becomes liquid at a lower temperature as well and may "salt" the surrounding food.

Jack.
THe bloke with the salt story, was he driving a triton and did he have a eperb straped to his belt? Eric.

Adding salt lowers the chemical potential of water giving a depresion of freezing point and elivation of boiling point. What that means is the ice will melt at a lower temperature, as such lowering the temperature of your eski. However you will use your ice up quicker maintaining this lower temp. So it doesn't really help your situation. Good for making an Ice/salt water slurry to intantly cool your coldie. Can get apprx -10 degrees by adding salt.

Hardy explained it well - Ice (water) freezes at 0 degrees- Salt water at -18 Degrees. Putting Salt on ice melts it, but the conversion of ice to water requires energy.

In your bath of Ice and water, the energy to emlt the ice with salt on it comes from other water/ice and is absorbed as heat, cooling the nearby ice and water. Hence you can us this to temporarily reduce the ice temperature further (down to the potential maximum -18) - great for quick freezing or at least cooling down your beer quicker.

If you need to keep stuff frozen but don't have a freezer (and have a heap of ice) then it's a good trick to know too.

The ice is cooler - must stay frozen longer huh? Uhuh - The downside is that the ice now will thaw at -18 not 0 degrees.....

Dammit! nothing in life is free.

Another thing worth considering is that that water in the esky with your ice could save your life if you're broken down in the middle of no-where on a hot day. Drinking Salt Water will kill you really quick.

Suzuki Viagra

With that answer I think you seriously need to get out more :)

Jack

I have heard the same theory never really tested it. Hate ice so I am going to buy a fridge.

I would be interested as to why it would have been suggested to anyone in the first place, is there something we don't know?



Lloydy

Off to Accessorise some more

jack, Back around 1970, was at Kununurra races, and a keg was supplied at one of the camps, for consumption, for us young blokes, and a few others. The temprite used must have been home made because it was set up in one of those frail foam eskis. However, the beer was cold, and the ice in the eski/temprite didn't thaw one bit, it was covered in a few mm's of salt. That lasted like that until after the keg was finished, I'm sure, because I was finished long before the keg was! Hooroo...

Fellows,
Pelagic in fishing terms mean fish that are not bottom feeders. Some of these fish include snapper, mackreal and tuna. As for the ice question. I do a lot of deep sea fishing here ( on great barrier reef) and we use salt a lot to bring the temperature of the fish down quickly and keep it in good condition. Yes, you do need a lot of ice, but for us getting the fish home and keeping it fresh for a few days is essential.
Hope I have enlightened you all.