Question

Express the relationship between the rate of production of water and the rate of disappearance of oxygen in the following reaction:

\[\ce{2H2 + O2 -> 2H2O}\]

Answer 1

The given reaction is \[\ce{2H2+O2−>2H2O}\]

To relate the rate of production of water to the rate of disappearance of oxygen, we use their stoichiometric coefficients.

1 mole of O₂ produces 2 moles of H₂O

\[\ce{\frac{d[H_2O]}{dt} = 2 \times \frac{d[O_2]}{dt}}\]

or,

Rate of production of H₂O = 2 × Rate of disappearance of O₂