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BITSAT2013ChemistryThermodynamics (C)Actual

For the dissociation reaction, H ₂( ~g ) 2 H ( g ) H =162 Kcal heat of atomisation of H is

Options

  1. A81 Kcal
  2. B162 Kcal
  3. C208 Kcal
  4. D218 Kcal

Correct answer

A. 81 Kcal

Step-by-step solution

H = H _ (product) - H _ (reactant) 162=2 H _ H - H _ H ₂ H _ H = 162 2 ( H _ H ₂ =0 ) H _ H =81 Kcal

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