00:01
The reason in cold winters a tub of water might be placed in a farmer's canning cellar to help prevent the canned food from freezing is the same reason why a farmer might also spray their trees with water just before an expected frost in the middle of the night.
00:19
That's because liquid water going to solid water or ice is an exothermic process.
00:33
So for an exothermic process, delta h is negative, and if delta h is negative, then heat is a product.
00:50
So as water ends up freezing, it actually releases heat.
00:59
The release of the heat into the cellar then can prevent the canned goods themselves from freezing.
01:09
So with this is an introduction, it looks like the best answer is.
01:13
Is the continual release of energy by the freezing water keeps the temperature of the cellar from going to below zero.
01:23
That's the first answer which i will call a.
01:28
The second answer isn't correct because cold is not anything.
01:34
So the cold in the cellar is consumed.
01:36
There's no such thing as the consumption of cold...