Chemistry · Equilibrium involving chemical processes: Law of chemical equilibrium, equilibrium constants (Kp and Kc) and their significance, the significance of Delta G and Delta G° in chemical equilibrium
2 moles of when heated in a closed vessels of 2 litre capacity at equilibrium of
2 moles of \( P C l_{5} \) when heated in a closed vessels of 2 litre capacity at equilibrium \( 40 \% \) of \( P C l_{5} \) dissociated in \( P C l_{3} \) and \( C l_{2} . \) What is the value of the equilibrium constant?
- A. 0.267
- B. 0.786
- C. 0.345
- D. 1.879
Step-by-step solution
Initial concentration of PCl5 = 2 mol / 2 L = 1 M. With 40% dissociation, equilibrium concentrations: [PCl5] = 0.6 M, [PCl3] = [Cl2] = 0.4 M. Kc = (0.4×0.4)/0.6 = 0.16/0.6 = 0.267.
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