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The bond dissociation energy of gaseous ...

The bond dissociation energy of gaseous `H_(2),Cl_(2)` and `HCl` are `104,58` and `103 kcal mol^(-1)` respecitvely. Calculate the enthalpy of formation for `HCl` gas.

Text Solution

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`1/2 H_(2) + 1/2 Cl_(2) to HCl`
`(104)/2 + 58/2 - 103 = -22 k cal`
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