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CBSE Class 11-science Answered

Mixture of the propane and butane occupy 3 liter volume complete combustion of this mixture produced 10 liters co^2 find the constitution of this mixture

Asked by mannkhatri112 | 01 May, 2019, 07:24: AM
Expert Answer
The combustion reactions are as;
 
straight C subscript 3 straight H subscript 8 space space plus space 5 straight O subscript 2 space space space rightwards arrow space 3 CO subscript 2 thin space thin space thin space space plus 4 straight H subscript 2 straight O

straight C subscript 4 straight H subscript 10 space space plus bevelled 13 over 2 straight O subscript 2 space space space rightwards arrow space 4 CO subscript 2 thin space thin space thin space space plus space space 5 straight H subscript 2 straight O
Let the volume of propane be x lit and volume of butane be 3-x lit.
 
 
CO2 formed by combustion of propane is 3x 
CO2 formed by combustion of butane is 4(3-x)
 
 
 
We have,
 
x+y =10 lit
 
Therefore
 
3x +  4(3-x) = 10
 
3x + 12 -4x = 10
 
x = 2 lit
 
As x is volume of propane = 2 lit
 
and volume of butane = (3 - x) 
 
                                 =3-2 = 1 lit
 
Therefore the composition of mixture is
 
Propane : Butane is 2:1
 
 
 
Answered by Varsha | 02 May, 2019, 02:45: PM
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