5. Based on the bond enthalpies (table), estimate the enthalpy of ethanol isomerization to dimethyl ether CH3CH2OH(g)=CH3OCH3(g).
Average bond enthalpies
Bond ΔН, kJ/mol Bond ΔН, kJ/mol
S-N 358 S-S 263
C=C 423 C-O 314
O-N 460 N-N 429

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