1.

30mL of mixture of methane and ethane in x : y ratio of volumes on combustioin gave 40mL of carbon dioxide. If 30mL of mixture is taken in y:x ratio, what is the volume of carbondioxide obtained under similar conditions?

Answer»

Solution :The COMBUSTION of methane and ethane is given by the equations
`CH_(4) overset(O_(2))to CO_(2)+2H_(2)O`:
`C_(2)H_(6) overset(O_(2))to 2CO_(2)+3H_(2)O`
1 volume of `CH_(4)="1 volume of "CO_(2)`
1 volume of `C_(2)H_(6)="2 volume of "CO_(2)`
Let, Volume of `CH_(4)` in the given mixture=x
Let, volume of `C_(2)H_(6)` in the given mixture=y
Then, x+y=30 `""` x+2y=40
`"y=10"x=30-10=20`
If y mL of `CH_(4)` is taken
the volume of `CO_(2)` obtained =y=10mL
If x mL of `C_(2)H_(6)` is taken
the volume of `CO_(2)` obtained =2x=2 x 20=40mL
The volume of CARBONDIOXIDE obtained by the combustion of 30mL of y:x volumes of methane and ethane =10+40=50mL


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