N 2 O 4 is dissociated to 33% and 40% at total pressure P 1 and P 2 atm respectively. Then the ratio P 1 / P 2 is

Question

N 2 O 4 is dissociated to 33% and 40% at total pressure P 1 and P 2 atm respectively. Then the ratio P 1 / P 2 is, 7/4, 7/3, 8/3, 8/5

MARKS App · Accepted Answer

K P = ( n N O 2 ) 2 n N 2 O 4 × P Σ n 1 For 33% dissociation K P = ( 2 × 0.33 ) 2 0.67 × P 1.33 For 40% dissociation K P = ( 2 × 0.40 ) 2 0.60 × P 1.40 So P 1 P 2 = 1.56 ≃ 1.60 = 8 5 .

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