A) The dissociation energy of the hydrogen molecule, \[{{H}_{2}}\].
B) The first four ionisation energies of carbon.
C) The dissociation energy of \[{{H}_{2}}\]and enthalpy and sublimation of carbon (graphite).
D) The first four ionisation energies of carbon and electron affinity of hydrogen.
Correct Answer: A
Solution :
To calculate average enthalpy of C ? H bond in methane following in formations are (i) needed dissociation energy of \[{{H}_{2}}\] i.e. \[\frac{1}{2}{{H}_{2}}(g)\xrightarrow[{}]{{}}H(g);\Delta H=x\](suppose) (ii) Sublimation energy of C(graphite) to C(g) \[C(graphite)\xrightarrow[{}]{{}}C(g);\Delta H=y(Suppose)\] Given \[C(graphite)+2{{H}_{2}}(g)\xrightarrow[{}]{{}}C{{H}_{4}}(g);\Delta H=75kJ\,mo{{l}^{-1}}\]
You need to login to perform this action.
You will be redirected in
3 sec
