Question

the volume of oxygen required for complete oxidation of 2 litres of methane at stp is

Answer 1

CH4+2O2--->CO2+2H2O
1mole+2mole--->1mole+2mole

So,2L+4L--->1L+2L

Therefore,4L O2 is required.

Answer 2

Answer:

For the complete oxidation of $2 litres$ of methane at STP, the volume of the oxygen required is $4 litres$.

Explanation:

Given,

The volume of the methane at STP = $2L$

Here, STP stands for the standard temperature and pressure.

For the complete oxidation of $2 litres$ of methane, the volume of the oxygen required =?

Now,

• The reaction of the oxidation of methane has shown below:
• $CH_{4} + 2O_{2} \rightarrow CO_{2} +2H_{2}0$

As we know,

• For 1 mole, the volume of an ideal gas at STP = $22.4 L$

Now, from the above reaction, we can say that;  

• One mole of methane is oxidized by 2 moles of oxygen.

Also,

• $22.4 litres$ of methane is oxidized by  $2\times 22.4litres$ of oxygen.

Therefore,

• $1 litre$ of methane is oxidized by = $\frac{2\times 22.4}{22.4}$ = $2 litres$

Also,

• $2 litres$ of methane is oxidized by = $(2\times 2 ) litres$ = $4 litres$

Hence,

• The oxygen volume required for the complete oxidation of $2litres$methane at STP = $4 litres$.