For which reaction, the volume is an irrelevant factor in determining Ke
Correct answer: C. Decomposition of N2O4
- A. Formation of ester
- B. Dissociation of PCI5
- C. Decomposition of N2O4
- D. Synthesis of NH3
Explanation
C) Decomposition of N2O4 In the decomposition of N2O4 (dinitrogen tetroxide), the reaction can be represented as N2O4 ⇌ 2NO2. The equilibrium constant, Ke, for this reaction (decomposition) is independent of volume. This is because the balanced equation shows that the number of moles of gas does not change on either side of the reaction. As a result, changes in volume do not affect the concentrations of N2O4 and NO2 at equilibrium, and volume becomes irrelevant in determining Ke. Therefore, option C is the correct answer.
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About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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