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  • Enthalpy change for reaction <img alt="4H_{\left ( g \right )}\rightarrow2H_{2\left ( g \right )} \, \, is\, \, 869.6\, \, KJ" src="https://entrancecorner.oncodecogs.com/gif.latex?4H_%7B%

Enthalpy change for reaction

4H_{\left ( g \right )}\rightarrow2H_{2\left ( g \right )} \, \, is\, \, 869.6\, \, KJ

The dissociation energy of H-H bond is?

Option: 1

-434.8\, \, kJ


Option: 2

-869.6\, \, kJ


Option: 3

+434.8\, \, kJ


Option: 4

+217.4\, \, kJ


Answers (1)

best_answer

2H_{2}\left ( g \right )\, \rightarrow 4H\left ( g\, \, \right )\Delta H=869.6KJ

H_{2}\left ( g \right )\, \rightarrow 2H\left ( g\, \, \right )\Delta H=\frac{869.6}{2}=434.8KJ

Option (3) is correct answer.

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