Question

in cold countries water is ussd as heat reservoir for wine and juice bottles to avoid their freezing

Answer 1

At first, I thought that the answer to this question was obvious. However, after further thought and investigation, I realized that there are several processes at work all of varying degrees of significance. The tough thing to decide is probably which process is most significant.

A few important facts to note in analyzing this problem.

1. Beer bottles/cans and soda bottles/cans are pressurized.
2. They all contain solutes in the solvent, water.
3. Both contain the solute CO2, carbon dioxide.

Most solutes will lower the freezing point of solvents when they are combined into a homogeneous mixture. In this case, we have carbon dioxide, the solute, dissolved into water, the solvent. Dissolved carbon dioxide in water will, in fact, lower the freezing point of the solution below 0 C.

Answer 2

water has a large amount of specific heat capacity which makes it durable to a large range of temperature.
it is used as mentioned because freezing point of juice and wine is much lesser than that of water. thus water keeps them isolated.

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:-)