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For the reaction, 2 N O 3 g ⇌ 2 N O g + O 2 ( g ) ( K c = 1.8 × 10 - 6 a t 184 ℃ ) ( R = 0.00831 kJ/(mol K) When K p and K c are compared at 184 ℃ , it is found that

Options

  1. AWhether K p is greater than less than or equal to K c depends upon the total gas pressure
  2. BK p = K c
  3. CK p is less than K c
  4. DK p is greater than K c

Correct answer

D. K p is greater than K c

Step-by-step solution

2 N O 3 g ⇌ 2 N O g + O 2 g K c = 1.8 × 10 - 6 a t 184 ℃ ( = 457 K ) R = 0.00831 k J m o l - 1 K - 1 K p = K c R T ∆ n g Where, ∆ n g = (gaseous products - gaseous reactants) =3-2=1 ∴ K p = 1.8 × 10 - 6 × 0.00831 × 457 = 6.836 × 10 - 6 > 1.8 × 10 - 6 Thus, K p > K c

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