3 L mixture of propane and butane on complete combustion at 298 K gave 10 L `CO_2` Calculate the compostion of the gas mixture.

Explanation

`C_3H_8+5O_2tounderset(3x)(3CO_2)+4H_2O(l)`
`underset(y)(C_4H_(10))+(13)/(2)O_2tounderset(4y)(4CO_2)+5H_2O(l)`
Let x and y L of `C_3H_8` and `C_4H_(10)` be present in mixture.
`thereforex+y=3` ..(i)
Volume of `CO_2` is
`3x+4y=10` …(ii)
Soving equation (i) and (ii), we get
`x=1L`
`y=2L`