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  • At 473 K, equilibrium constant K_ c for decomposition of phosphorus pentachloride PCl _ 5 is 8. 3 X 10^-3. If decomposition is depicted as PCl _5(g) PCl _ 3 (g) +Cl_2 (g) (b) what is the

Q 7.30     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)\rightleftharpoons PCl_{3}(g)+Cl_{2}(g), \Delta _{r}H^{+}=124.0kJ mol^{-1}

        (b)     what is the value of Kc for the reverse reaction at the same temperature ?

Answers (1)

for the reverse reaction , 

K_c' = \frac{1}{K_c}= \frac{1}{8.3 \times 10^{-3}} = 120.48

Posted by

Satyajeet Kumar

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