1.

The heat of combustion of sucrose, C_(12)H_(22)O_(11)(s) at constant volume is - 1348.9 kcal mol^(-1) at 25^(@)C then the heat of reaction at constant pressure, when stem is produced, is

Answer»

Solution :The combustion equation of sucrode is
`C_(12)H_(22)O_(11)(S)+12O_(2)(g) RARR 12CO_(2)(g)+11H(2)O(g)`
Here,
`Deltan_(g)=` sum of gaseous product moles-sum of gaseous reactant moles
`Deltan_(g)=11`
`DeltaH=DeltaE+Deltan_(g)RT`,
Here, `DeltaE=-1348.9 kcal`
`R=2.0 cal, T=25+273=299 K`
`:. DeltaH=(-1348.9xx1000)+11xx2xx298`
`=-1348900+6556=-1342344 cal`
`=-1342. 344 kcal`


Discussion

No Comment Found

Related InterviewSolutions