Using bond-energy data, what is H deg. for the followingreaction? CH4(g) + 2Cl2(

Question

Using bond-energy data, what is H deg. for the followingreaction? CH4(g) + 2Cl2(g) = CCl2(g) + 2H2(g) Bond:            BondEnergy:                         (kJ/Mol) C-H                     411 H-H                     432 Cl-Cl                     240 C-Cl                     327 Using bond-energy data, what is H deg. for the followingreaction? CH4(g) + 2Cl2(g) = CCl2(g) + 2H2(g) Bond:            BondEnergy:                         (kJ/Mol) C-H                     411 H-H                     432 Cl-Cl                     240 C-Cl                     327

Explanation / Answer

H0rxn = bond energy of reactants -bond energy of products               ={4(C-H bond energy)+2(Cl-Clbond energy)}-{2(C-Cl bond energy)+2(H-H bond energy)}              = {4(411)+2(240)}kJ/mol -{2(327)+2(432)}kJ/mol              =606kJ/mol

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