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Questions  >>  JEEMAIN and NEET  >>  Physics  >>  Class11  >>  Thermodynamics
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The standard enthalpy of formation $(\Delta H_f^{\circ} )\: at\: 298\: K$ for methane, $CH_4(g),$ is -74.8 kJ/mol. The additional information required to determine the average energy for $C-H$ bond formation would be

$\begin {array} {1 1} (A)\;\text{the dissociation energy of $H_2$ and enthalpy of sublimation of carbon.} \\ (B)\;\text{latent heat of vaporization of methane} \\ (C)\;\text{the first four ionization energies of carbon and electron gain enthalpy of hydrogen.}\\ (D)\;\text{the dissociation energy of hydrogen molecule} \end {array}$

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