1.

The standard enthalpy of combustion of sucrose is -5645 kJ mol^(-1). What is the advantage (in kJ mol^(-1) of energy released as heat) of complete aerobic oxidation compared to anaerobic hydrolysis of sucrose to lactic acid ? Delta H_(f)^(@) for lactic acid, CO_(2) and H_(2)O is -694, -395.0 and -286.0 respectively.

Answer»


Solution :`C_(12)H_(22)O_(11)+12O_(2) rarr 12CO_(2) +11H_(2)O""` [A erobic oxidation]
`DeltaH=-5645" kJ/mole"`
`C_(12)H_(22)O_(11)+H_(2)O rarr 4 CH_(3)-overset(OH)overset(|)(CH)-COOH`
`DeltaH=-249`
Advantage `=5645-249=5396" kJ mol"^(-1)`


Discussion

No Comment Found

Related InterviewSolutions