Water when warming up absorbs one calorie per gram per degree C. Ice
when warming up ( but not melting , say warming from minus 10 to zero
degrees C ) absorbs a little less than one calorie per gram per degree
C. Ice when melting adsorbs 80 calories per gram without changing
temperature.


Ice made from pure water melts at 0 degrees C. Ice with other things
in it melts at a lower temperature. Salt water, water and antifreeze,
water and Alcohol, frozen foods.

So frozen foods will melt before ice made with pure water melts. And
it is the melting of ice that adsorbs a lot of heat. So ice made of
water and alcohol will melt at say minus 10 degrees C. Keeping the
temperature at minus 10 degrees C. and keeping the frozen food frozen.
If frozen food thaws and is refrozen, it is not as appetizing.


Dan