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