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JEE Main2006ChemistryThermodynamics (C)Actual

The standard enthalpy of formation ( _ f H ^ ) at 298 ~K for methane, CH ₄( ~g ) , is -74.8 ~kJ ~mol ⁻¹ . The additional information required to determine the average energy for C - H bond formation would be

Options

  1. Athe dissociation energy of H ₂ and enthalpy of sublimation of carbon
  2. Blatent heat of vapourization of methane
  3. Cthe first four ionization energies of carbon and electron gain enthalpy of hydrogen
  4. Dthe dissociation energy of hydrogen molecule, H ₂

Correct answer

A. the dissociation energy of H ₂ and enthalpy of sublimation of carbon

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