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The decomposition of HNO 3 represented below attains equilibrium at a given P eq . and T . If we start 4 HNO 3 c g ⇌ 4 NO 2 g + 2 H 2 O g + O 2 g with pure HNO 3 having initial pressure P i , then at equilibrium which among the following is correct?

Options

  1. AK P = 1 0 2 4 Po 2 7 P eq. - 7 Po 2 4
  2. BK P = 1 0 2 4 Po 2 7 P i - 4 Po 2 4
  3. CK P ∘ = 1 0 2 4 Po 2 7 P eq. - 7 Po 2 4 × 1 P ∘ 3
  4. DAll of these

Correct answer

D. All of these

Step-by-step solution

4 HNO 3 g ⇌ 4 NO 2 g + 2 H 2 O g + O 2 ; Pressure at equilibrium is P eq. P i 0 0 0 P i - 4 P 4 P 2 P P P eq. = P i - 4 P + 4 P + 2 P + P ∴   P i - 4 P = P eq. - 7 P = P eq. - 7 Po 2 ; P = Po 2 K P = P NO 2 4 P H 2 O 2 Po 2 P HNO 3 4 = 1 0 2 4 Po 2 7 P eq. - 7 Po 2 4 = 1 0 2 4 Po 2 7 P i - 4 Po 2 4 and K P ∘ = P NO 2 4 P H 2 O 2 Po 2 P HNO 3 4 × 1 P 0 3 = 4 P 2 1 × 2 P 2 × P P eq. - 7 Po 2 4 × 1 P 0 3 = 1 0 2 4 Po 2 7 P eq. - 7 Po 2 4 = 1 P 0 3

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