Consider the reactions \[C(s)+2{{H}_{2}}(g)\to C{{H}_{4}}(g),\Delta H=-x\,kcal\] \[C(g)+4H(g)\to C{{H}_{4}}(g),\,\Delta H=-{{x}_{1}}\,kcal\] \[C{{H}_{4}}(g)\to C{{H}_{3}}(g)+H(g),\,\Delta H=+y\,kcal\] The bond energy of \[C-H\] bond is [JIPMER 1997]

\[{{x}_{1}}\,kcal\,mo{{l}^{-1}}\]

\[{{x}_{1}}/4\,kcal\,mo{{l}^{-1}}\]

Consider the reactions \[C(s)+2{{H}_{2}

1.	Consider the reactions \[C(s)+2{{H}_{2}}(g)\to C{{H}_{4}}(g),\Delta H=-x\,kcal\] \[C(g)+4H(g)\to C{{H}_{4}}(g),\,\Delta H=-{{x}_{1}}\,kcal\] \[C{{H}_{4}}(g)\to C{{H}_{3}}(g)+H(g),\,\Delta H=+y\,kcal\] The bond energy of \[C-H\] bond is [JIPMER 1997]
A.	\[y\,kcal\,mo{{l}^{-1}}\]
B.	\[{{x}_{1}}\,kcal\,mo{{l}^{-1}}\]
C.	\[x/4\,kcal\,mo{{l}^{-1}}\]
D.	\[{{x}_{1}}/4\,kcal\,mo{{l}^{-1}}\]
Answer» B. \[{{x}_{1}}\,kcal\,mo{{l}^{-1}}\]

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Consider the reactions \[C(s)+2{{H}_{2}}(g)\to C{{H}_{4}}(g),\Delta H=-x\,kcal\] \[C(g)+4H(g)\to C{{H}_{4}}(g),\,\Delta H=-{{x}_{1}}\,kcal\] \[C{{H}_{4}}(g)\to C{{H}_{3}}(g)+H(g),\,\Delta H=+y\,kcal\] The bond energy of \[C-H\] bond is [JIPMER 1997]

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