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On combustion carbon forms two oxides CO...

On combustion carbon forms two oxides CO and `CO_(2)`, heat of formation of `CO_(2)` is `-94.3kcal` and that of CO is -26. kcal. Heat of combustion of carbon is:

A

26.0 kcal

B

`- 94.3` kcal

C

68.3 kcal

D

`- 120.3` kcal

Text Solution

Verified by Experts

The correct Answer is:
B
`C+O_(2)rarrCO_(2),DeltaH=-94.3`
This is also heat of formation of `CO_(2)`
`C+(1)/(2)O_(2)rarrCO, DeltaH=-26.0`.
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