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CBSE Class 11-science Answered

(a) What is a refrigerator?  Explain its principle by a schematic diagram.  Name the gas commonly used in refrigerators? (b)  In the household refrigerators, name the agency that does the work.  
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer

(a)  Suppose the working substance takes heat Q2 from a sink at a lower temperature, does the work W on it and a higher amount of heat Q1 = Q2 + W, is rejected to the source at a higher temperature.

                 

Such a device, which by doing work on it is made to extract heat from a colder body, is called a refrigerator and the working substance the refrigerant.  The gas used is Freon (CCI2F2 - dichlorodifluoromethane).

(b)  In the household refrigerators, the work is done with the help of an electric motor.

 

Answered by | 04 Jun, 2014, 03:23: PM

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