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In a refrigerator the direction of heat flow is reversed by doing some mechanical work. Suppose the rating of the refrigerator is 380 Watts that is 380 joules per second. i.e rate of doing work or it can dispel heat outside at a rate of 380 joules per second.

The situation at normal room temperature:
If we keep hot water (Water, which has large content of heat) inside a freezer. Because the temperature of water is higher than the temperature outside there is a natural flow of heat. And thus increasing the rate of discharge of heat. In this process refrigerator might exceed its rating and motor of the refrigerator will fail.
Suppose we make a refrigerator of higher power rating so that it doesn't fail like the previous case. We will see hot water freezing faster.

During winters, the temperature of the wind decrease sharply making the surroundings colder. Making the atmosphere a heat sink or a natural refrigerator of very high power. When we expose water of 35 degree Celsius it takes longer time to freeze. Whereas the hot water at nearly 90 degree Celsius will freeze faster. Mechanical work of refrigeration is being done by high speed wind accompanied by natural heat flow direction, the heat discharge is very fast in the case of hot water.

Based on the experiment done by Mr. Herbert
   • Which freezes faster, hot or cold water. A...