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What is the meaning of refrigerant R21?

  
Total Answers and Comments: 1 Last Update: May 13, 2008     Asked by: citd2003 
  
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May 13, 2008 11:05:40   #1  
challawar_mayur Member Since: May 2008   Contribution: 3    

RE: What is the meaning of refrigerant R21?
Generally refrigerants are designated by a code
For a compound in the form Cm Hn Clp Fq
the code is given by
R-(m-1)(n+1)(q)

where 'm' represents no. of carbon atoms
'n' represents no. of hydrogen atoms
'p' represents no. of chlorine  atoms
'q' represents no. of fluorine atoms

The above designation is possible only when n+p+q=2m+2

In case of R-21, we can say it contains 'one' hydrogen atom

'one' fluorine atom,
'one' carbon atom,

Hence to balance the compound it should have two chlorine atoms hence the formula of R21 is C H Cl2 F,therefore R21 is dichloro monofluoro methane

 
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Latest Answer : Generally refrigerants are designated by a codeFor a compound in the form Cm Hn Clp Fqthe code is given by R-(m-1)(n+1)(q)where 'm' represents no. of carbon atoms'n' represents no. of hydrogen atoms'p' represents no. of chlorine  ...
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