Chemistry
Grade-8
Easy
Question
Which of the following gas is used as a refrigerant?
- Nitrous oxide
- Carbon dioxide
- Ammonia
- Sulfur dioxide
Hint:
Carbon dioxide is a very dense refrigerant.
The correct answer is: Carbon dioxide
Carbon dioxide is a very dense refrigerant with a high volumetric efficiency and hence allows the pipe size and compressor swept volume to be much smaller than an equivalent HFC system. The effect of pipeline pressure drop is less noticeable with carbon dioxide than HFC refrigerants.
Dry ice is the solid form of carbon dioxide. It is commonly used for temporary refrigeration as CO2 does not have a liquid state at normal atmospheric pressure and sublimates.
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