Question
Download Solution PDFWhich of the following is the correct designation of the refrigerant CCl3F?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Nomenclature of refrigerants :
|
Refrigeration |
Designation |
Example |
|
Fully Saturated Hydrocarbon compounds (freon)
|
R - (m-1)(n + 1)p n + p + q = 2m + 2 Cm HnFp Clq |
R - 11 = CFCl3 ; R - 22 = CHF2Cl R - 12 = CF2Cl2 (Freon12) R- 134 = C2H2F4 Ecofriendly (No clorine) |
|
Unsaturated Hydrocarbon (freon)
|
R - 1(m-1)(n + 1) p n + p + q = 2m Cm HnFp Clq |
R-1150 = C2H4 |
|
Inorganic Compound |
R - (700 + Mol Weight) |
R-717 = NH3 , R-744 = CO2 R-764 = SO2 , R-729 = Air |
Calculation:
Given:
Molecular composition of CCl3F:
- Number of carbon atoms, m = 1
- Number of hydrogen atoms, n = 0
- Number of fluorine atoms, p = 1
- Number of chlorine atoms, q = 3
Step 1: Verify the equation n + p + q = 2m + 2
Substituting the values:
0 + 1 + 3 = 2(1) + 2
4 = 4
This satisfies the equation.
Step 2: Apply the designation formula R = (m-1)(n+1)p
For m = 1 : m-1 = 1-1 = 0
For n = 0 : n+1 = 0+1 = 1
p = 1
Thus, the designation becomes:
R = (0)(1)(1) = 0 + 1 + 1
Step 3: Add the remaining part of the designation:
Combine the calculated values. Since (m-1) = 0 , the resulting number remains unchanged.
The designation becomes R-11 .
The correct designation of the refrigerant CCl3F is:
\( R-11 \)
Last updated on May 28, 2025
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