Question

Select the correct order of steps in which a working substance (gas) goes through in a refrigerator.

• A. Expansion of gas, absorption of heat, heating of vapour, release of heat
• B. Absorption of heat, expansion of gas, heating of vapour, release of heat
• C. Heating of vapour, expansion of gas, absorption of heat, release of heat
• D. Heating of vapour, absorption of heat, expansion of gas, release of heat

Hint:

In refrigeration, the working substance absorbs heat, expands, gets compressed and heated, and then releases heat to the surroundings.

Answer 1

The Correct Option is B

Step 1: Understand the process in a refrigerator. 
In a refrigerator, the working substance (usually a gas) undergoes four main steps:
 
1. Absorption of heat from the refrigerated space.
2. Expansion of the gas, which cools it down further.
3. Heating of the vapor in the compressor, which turns it into a high-pressure gas.
4. Release of heat to the surroundings.

Step 2: Identify the correct sequence.
The correct order is first absorbing heat, then expanding the gas, heating the vapor, and finally releasing heat.