Question

What volume of oxygen would be required for the complete combustion of 100 litres of ethane? The following equation is as follows:

$2C_2{H}_6+7O_2\to 4C{O}_2+6H_{2}O$

• A. 350 litres
• B. 261 litres
• C. 580 litres
• D. 447 litres
• E. 253 litres

Answer 1

The correct option is A

350 litres

$\underset{2vol.}{2C_2{H}_6\left(g\right)}+\underset{5vol.}{7O_2\left(g\right)}\to \underset{4vol.}{4C{O}_2\left(g\right)}+\underset{6vol.}{6H_{2}O\left(g\right)}$

By Gat Lussac’s law:

2 vol. of ethane require for complete combustion = 7 vol. of oxygen.

100 litres of ethane will require for complete combustion = $\frac{7}{2}\times 100$ = 350 litres of oxygen.

Hence, the required volume of oxygen is 350 litres.