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A gas mixture of $3l$ of propane $(C_3H_8)$ and butane $C_4H_{10}$ on complete combustion at $25C^{\large\circ}$ produced $10l$ $CO_2$.Find out the composition of gas mixture.


1 Answer

$C_3H_8+5O_2\rightarrow 3CO_2+4H_2O(l)$
$C_4H_{10}+\large\frac{13}{2}$$O_2\rightarrow 4CO_2+5H_2O(l)$
Let $a$ litre of $C_3H_8$ and $b$ litre of $C_4H_{10}$ be present in mixture.
Volume of $CO_2$ formed =10=$CO_2$ formed by $C_4H_{10}$
Solving equation (1) and (2)
Hence (a) is the correct answer.
answered Nov 6, 2013 by sreemathi.v
selected Nov 6, 2013 by balaji.thirumalai

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