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Phosgene, C O C l 2 , a poisonous gas decomposes according to the equation C O C l 2 g ⇌ C O g + C l 2 g If K c = 0.083 at 900 ° C , what is the value of K c ?

Options

  1. A0.125
  2. B8.0
  3. C6.1
  4. D0.16

Correct answer

B. 8.0

Step-by-step solution

K p = K c R T Δ n g where Δ n g = 1 + 1 - 1 = 1 , R , = 0.082 L atm mo l - 1 K - 1 and T = 1173 K So K p = K c ( R T ) 1 = 0.083 × 0.082 × 1173 7.98 ≃ 8.0

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