why does refrigerator does not give us energy?(please see details)?

Question

Heat is a form of energy. we absorb heat from the food in refrigerator

Answer 1

Fridge DO give off a lot of heat. Just put your hand where its fan blows and you will see.

Answer 2

The zero-th law of thermodynamics is that heat flows from "hot" to "cold". If you have two objects at two different temperatures, heat energy will flow from the object with the greater temperature to the object with the lower temperature until an equilibrium is reached (at which both objects have the same temperature).

A refrigerator reverses the natural direction of heat flow, it takes heat out of 'cold' objects and moves it to warmer surroundings.
In order to do this, the refrigerator required energy input so that it can do work.

Without getting into too many details about how refrigerators work...
They compress a gas and as the gas compresses, its temperature rises. They then allow this compressed gas to cool by allowing its heat energy to flow out into the surrounding room outside of the refrigerator (you can feel this heat if you [carefully] stick your hand behind the refrigerator). After the gas has cooled, the gas is allowed to expand again. As the gas expands its temperature drops. The refrigerator then uses this cool gas to lower the temperature inside the refrigerator.
But this process requires energy input despite the fact that we are removing heat energy from the refrigerator's contents.

Answer 3

Heat goes from the warmer to the colder. More energy is used to get the fridge cold than can be extracted from warm food inside. What you can do is sit behind the fridge on a cold winters day to save on heating.
Unfortunately the backside of a fridge is always dirty ;-)

Answer 4

Energy can neither be created nor destroyed. R-gerator extracts heat and gives out to the surroundings. That is why keeping open the doors of of t he RG will ultimately heat the roominstead of cooling.