The combustion of benzene (l) gives CO2(g) and H2O(l). Given that heat of combustion of benzene at constant volume is −3263.9 kJ mol−1 at 258 C; heat of combustion (in kJ mol−1) of benzene at constant pressure will be :
(R=8.314 JK−1 mol−1)
−3267.6
4152.6
−452.46
3260
As we learned
Molar heat capacity for isobaric process C(p) -
- wherein
or
For chemical reactions;
Option 1)
−3267.6
Option 2)
4152.6
Option 3)
−452.46
Option 4)
3260
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