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MHT CET2008ChemistryThermodynamics (C)

If C (s)+ O ₂(g) CO ₂(g) ; H=r and CO (g)+ 1 2 O ₂ CO ₂(g): H=s then, the heat of formation of CO is

Options

  1. Ar+s
  2. Br-s
  3. Cs-r
  4. Drs

Correct answer

B. r-s

Step-by-step solution

C (s)+ O ₂(g) CO ₂(g) ; H=r ...(i) CO (g)+ 1 2 O ₂(g) CO ₂(g) ; H=s ...(ii) C (s)+ 1 2 O ₂(g) CO (g) ; H=? Subtract Eq. (ii) from Eq. (i)

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