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The heat of combustion of sucrose C(12) ...

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 steam is producced, is

A

`-1348.9` kcal

B

1342.344 kcal

C

1250 kcal

D

`-1250` kcal

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The correct Answer is:
B
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At constant volume and at 298 K , the heat of combustion of sucrose [C_(12)H_(22)O_(11) (s)] is -1348.9 kcal mol^(-1) . If steam is produced during the combuston, the heat of reaction at constant pressure will be

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