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Home  >>  JEEMAIN and AIPMT  >>  Chemistry  >>  Equilibrium
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Which of the following is incorrect about relationship between $K_p$ and $K_c$?

(a) When, $\Delta n_g = 0, K_p = K_c$

(b) When, $\Delta n_g > 0, K_p > K_c$

(c) When, $\Delta n_g < 0, K_p < K_c$

(d) When, $\Delta n_g > 0, K_p < K_c$

Can you answer this question?
 
 

1 Answer

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Toolbox:
  • $ K_p = K_c (RT)^{\Delta n_g} $
 
Answer: When, $\Delta n_g > 0, K_p < K_c$
 
Here, $ \Delta n_g $ = change in the number of gaseous moles
 
When, $ \Delta n_g = 0, K_p = K_c $
e.g., $ H_2 (g) + I_2 (g) \rightleftharpoons 2HI (g) $
 
When, $ \Delta n_g > 0, K_p > K_c $
e.g., $ PCl_5 (g) \rightleftharpoons PCl_3 (g) Cl_2 (g); \Delta n_g = 2 - 1 = 1 $
 
When, $ \Delta n_g < 0, K_p < K_c $
e.g., $ N_2 (g) + 3H_2 (g) \rightleftharpoons 2NH_3 (g); \Delta n_g = 2 - 4 = -2 $

 

answered Nov 15, 2013 by mosymeow_1
edited Nov 23, 2013 by mosymeow_1
 

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