Using bond-energy data, what is H deg. for the followingreaction? CH3OH(g) + H2S

Question

Using bond-energy data, what is H deg. for the followingreaction? CH3OH(g) + H2S(g) = CH3SH(g) + H2O(g) Bond:            BondEnergy:                         (kJ/Mol) C-H                     411 C-0                     358 O-H                    459 C-S                     272 S-H                     363 Using bond-energy data, what is H deg. for the followingreaction? CH3OH(g) + H2S(g) = CH3SH(g) + H2O(g) Bond:            BondEnergy:                         (kJ/Mol) C-H                     411 C-0                     358 O-H                    459 C-S                     272 S-H                     363

Explanation / Answer

H = sum of bond energies of reactants - sum of bond energies of products         = {three C-Hbonds+ one C-Obond + one O-H bond+ two H-Sbonds}-{three C-H bonds + one C-S bond +one S-H bond +two O-Hbonds}         ={3(411)+1(358)+1(459)+2(363)}kJ/mol-{3(411)+1(272)+1(363)+2(459)}kJ/mol         =-10kJ/mol

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