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MHT CET2019Evening ShiftChemistryThermodynamics (C)Actual

If C s + O 2 g → C O 2 g , Δ H = - X , C O g + 1 2 O 2 g → C O 2 g , Δ H = - Y , Calculate Δ f H for C O g formation

Options

  1. A–Y –X
  2. BY – X
  3. CX + Y
  4. DY + X

Correct answer

B. Y – X

Step-by-step solution

C ( s ) + O 2 ( g ) → C O 2 g C O - g + 1 2 O 2 - g → C O 2 - g _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ C s + 1 2 O 2 g → C O g _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ∴ Δ , H C O = Δ H 1 - Δ H 2 = x + y o r y - x

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