(solved)Question 1.26 of NCERT Class XI Chemistry Chapter 1

If 10 volumes of dihydrogen gas reacts with five volumes of dioxygen gas, how many volumes of water vapour would be produced?

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Parveen,

Question 1.26
NCERT Class XI Chemistry

If 10 volumes of dihydrogen gas reacts with five volumes of dioxygen gas, how many volumes of water vapour would be produced?

Video Explanation
(detailed solution given after this video)

Please watch this youtube video for a quick explanation of the solution:

Solution in Detail

balanced chemical equation with Gay Lussac's law of Gaseous Volumes:

$\displaystyle \underset{2\text{ vols}}{2\text{H}_2 \text{ (g)}} + \underset{1 \text{ vol}}{\text{O}_2\text{ (g)}} \rightarrow \underset{2\text{ vols}}{2\text{H}_2\text{O (g)}}$

Assumption: same pressures and temperatures of O2, H2 and H2O

Volumes of H2 = 10 vols given

So adjust the equation by using 5 as the mulitplier

10 vols H2 + 5 vols O2 → 10 vol H20

vol of O2 given 5 vols, so there is no limiting reagant.

So volume of vapor = 10 vols Answer!

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