Quote:
Originally Posted by masraum
But that water will accelerate the melting of the ice.
The amount of heat required to melt 2 kg of ice (~4.4 pounds) is 668 kilojoules (that's taking ice at 32º and melting it to water at 32º
If you had the same amount of water (2 kg) at 32ºF it would only take 186 kilojoules to warm that water up to 72ºF.
You really want max ice and minimum water.
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I’m sticking with my answer, but honestly don’t know. It’s an interesting question, and I don’t think I could have answered it when I studied thermodynamics many years ago in one class.
Your numbers say to me that the ice absorbs a lot of heat in changing phases, which means it’s keeping the water near 32 degrees. The water, in turn, can absorb more heat from the beer, since it’s contacting it much more completely than the ice would.
Question- do you think you’d get cold faster in a tub of chopped ice or water at/near 32 degrees with plenty of ice to keep it from warming up? (Or like the ocean where the Titanic sank).
It would be interesting if this has been evaluated scientifically.