Question

The coding in refrigerator is due to
A) reaction of the refrigerator gas
B) expansion of ice
C) the expansion of the gas is the refrigerator
D) the work of the compressor

Answer 1

Hint: The hot gas in the coils, it condenses, reaches the colder kitchen air temperature. The refrigerant absorbs heat inside the refrigerator and cools the temperature.

Complete step-by-step answer:
To solve this question, first we should know about refrigerators. Refrigeration has created major advances in our ability to efficiently store food and other items for a long period of time. In air conditioners, the same equipment used to power fridges is also used.
Now, let us find the solution from the given options-
A) The gaseous-formed refrigerant is then transported to the compressor, where it is compacted into a high-pressure hot gas which then reaches the condenser coil. So, the reaction of the refrigerator is an incorrect answer. Thus, option A is an incorrect option.
B) The gas in a refrigerator induces freezing on expansion due to the density of the gas going down. So, expansion of ice is an incorrect answer. Thus, option B is an incorrect option.
C) Refrigerator cooling is caused by the expansion of the gas in the refrigerator. The compressor inserts the refrigerant vapour, raises its pressure, and drives it out of the refrigerator into the coils. The hot gas in the coils, it condenses, reaches the colder kitchen air temperature. The refrigerant absorbs heat inside the refrigerator and cools the temperature. So, the expansion of the gas in the refrigerator can be the correct answer.
D) The compressor inserts the refrigerant vapour, raises its pressure, and drives it out of the refrigerator into the coils. So, the work of the compressor is an incorrect answer. Thus, option D is an incorrect option.

Thus, the right option is option C i.e. the expansion of the gas is the refrigerator.

Note: One of the most significant practical applications of the thermodynamic principles is the heat engine. In the heat engine heat is consumed at high temperature from a "working substance" and partly transformed to work.