MHT CET 2022 Chemistry question

ChemistryThermodynamicsMHT CET 2022

Calculate bond enthalpy of H-Cl bond from following reaction H_{2(g)} + Cl_{2(g)} \longrightarrow 2\ HCl_{(g)},\ \Delta_rH^0 = -185\ kJ (Given bond enthalpies of H-H, Cl-Cl bond are 435.0 kJ and 244 kJ mol respectively)

Answer: (B)

Solution

. Let the H-Cl bond enthalpy be . Then , so

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Question ID VK-095782