Question
Why is it that a tub of water placed in a farmer's canning cellar helps prevent canned food frorn freezing in cold winters?
Step 1
When water freezes, it undergoes a phase change from liquid to solid. During this phase change, energy is released. This is known as the latent heat of fusion. For water, this is approximately 80 calories per gram. Show more…
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Why is it that a tub of water placed in a farmer’s canning cellar helps prevent canned food from freezing in cold winters?
Why is it that in cold winters, a tub of water placed in a farmer's canning cellar helps prevent canned food from freezing? The continual release of energy by the freezing water keeps the temperature of the cellar from going below 0°C. The cold in the cellar is consumed by freezing the water, not the canned goods. As long as the water remains in the liquid phase, evaporation will give off heat to the cellar. If the canned goods are in the tub of water, molecular interactions will keep them from freezing.
A root cellar is an underground chamber used to store fruits, vegetables, and even meats. In extreme cold, farmers put large vats of water into the root cellar to prevent the fruits and vegetables from freezing. Explain why this works.
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