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Which of the following shows little or no net reaction when the volume of the...

Chemistry
JAMB 2004

Which of the following shows little or no net reaction when the volume of the system is decreased?

  • A. H2(g) + I2(g) ↔ 2HI(g)
  • B. 2NO2(g) ↔ N2O4(g)
  • C. PCl5(g) ↔ PCl3(g) + Cl2(g)
  • D. 2O3(g) ↔ 3O2(g)
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Correct Answer: Option A
Explanation

According to Boyle's law, an increase in pressure is inversely proportional to volume at constant temperature. This implies as volume increases, pressure will decrease and vice versa. However, as we consider all the reactions given in the options, the total number of moles of the reactants (LHS) is equal to the total number of moles of the product (RHS) for option A, pressure and invariably volume will have little or no effect on the equilibrium system.

There is an explanation video available below.


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Explanation Video

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