Question

Air contains 20% by volume of oxygen.The volume of air required for the complete combustion of 1L of methane under the same conditions is

Answer 1

22.4L if CH4 requires 44.8L of oxygen. For 1L 2L of oxygen is required. But in 1L of air there is only 200ml of oxygen. In 10L of air(200*10)=2L of oxygen will be present. Therefore 10L of air is required.

Answer 2

For 1 liter of methane, 2 liter of oxygen is needed.

However in 1 liter of air,

there is only 200 ml of oxygen found.

In 10 liter of air,

2 liter of oxygen will be found.

Thus, 10 liter is needed. 22. 4liter,

if CH4 need 44.8 liter of oxygen.

The methane under same condition need 10 liter.