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JEE Main201912 Jan 2019Morning ShiftChemistryChemical EquilibriumActual

Two solids dissociate as follows: A s ⇌ B g + C g ;   K P 1 = x    atm 2 D s ⇌ C g + E g ;   K P 2 = y    atm 2 The total pressure when both the solids dissociate simultaneously is:

Options

  1. Ax + y   atm
  2. Bx 2 + y 2   atm
  3. Cx + y   atm
  4. D2 x + y   atm

Correct answer

D. 2 x + y   atm

Step-by-step solution

k p 1 = P 1 P 1 + P 2 k p 2 = P 2 ( P 1 + P 2 ) k P 1 + k P 2 = ( P 1 + P 2 ) 2 x + y = ( P 1 + P 2 ) 2 P 1 + P   2 = x + y 2 ( P 1 + P 2 ) = 2 x + y P Total = P B + P C + P E = 2 ( P 1 + P 2 ) = 2 x + y

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