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Sahay Sir > Question Answers > NCERT Exemplar Class 11 > Chemistry > Chapter 7 - Equilibrium > At 473 K, equilibrium constant Kc for decomposition of phosphorus pentachloride, PCl5 is 8.3×10^−3 . If decomposition is depicted as, PCl 5(g)⇌PCl 3(g)+Cl2(g) Δ rH ⊖ = 124.0 kJ mol^−1 (a) Write an expression for Kc for the reaction. (b) What is the value of Kc for the reverse reaction at the same temperature? (c) What would be the effect on Kc if (i) more PCl5 is added (ii) pressure is increased (iii) the temperature is increased ?

At 473 K, equilibrium constant Kc for decomposition of phosphorus pentachloride, PCl5 is 8.3×10^−3 . If decomposition is depicted as, PCl 5(g)⇌PCl 3(g)+Cl2(g) Δ rH ⊖ = 124.0 kJ mol^−1 (a) Write an expression for Kc for the reaction. (b) What is the value of Kc for the reverse reaction at the same temperature? (c) What would be the effect on Kc if (i) more PCl5 is added (ii) pressure is increased (iii) the temperature is increased ?

2.0 mol litre^−1 H2 ​ and 0.5 mol litre^−1 NH3. Is the reaction at equilibrium? If not At 473 K Equilibrium constant equilibrium constant Kc for decomposition of phosphorus pentachloride in which direction does the reaction tend to proceed to reach equilibrium? Kc for the reaction n2 N2(g)+3H2(g) ⇌ 2NH3(g) ; at 500 K is 0.061 litre 2 mole^−2. At a particular time PCl5 is 8.3×10^−3 . If decomposition is depicted as the analysis shows that composition of the reaction mixture is 3.00 mol litre^−1