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Heat evolved in the reaction H(2)+Cl(2...

Heat evolved in the reaction
`H_(2)+Cl_(2) rarr 2HCl` is 182 kJ Bond energies H- H = 430 kJ/mole, `Cl-Cl = 242kJ//"mole"`. The H-Cl bond energy is

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The correct Answer is:
427
`Delta H = -2 in_(H - Cl) + in_(H - H) + in_(Cl - Cl)`
`-182 = -2 xx a + 430 + 242`
` a = 427 kJ mol^(-1)`
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