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Calculate the heat of formation of carbo...

Calculate the heat of formation of carbon monoxide from the following data :
`C(s)+O_(2)(g) to CO_(2)(g), DeltaH=-94kcal`
`2CO(g)+O_(2)(g) to 2CO_(2)(g), DeltaH=-136 kcal`

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The correct Answer is:
(-26 kcal)
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