MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryChemical EquilibriumEffect of Stoichiometry on K
At a given temperature, the equilibrium constant for reaction PCl5(g) PCl3(g) + Cl2(g) is 2.4 × 10–3. At the same temperature, the equilibrium constant for reaction PCl3(g) + Cl2(g) PCl5(g) is
A.2.4 × 10–3
B.– 2.4 × 10–3
C.4.2 × 102✓ Correct
D.4.8 × 10–2
Explanation
-3 1 k = 2.4×10 3 2 1 5 PCl [Cl ] k = PCl 5 2 2 3 1 PCl 1 k = Cl PCl k 2 -3 1 = = 4.2×10 2.4×10
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