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

Question

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

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

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

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`