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Calculate the heat of formation of CH(3)...

Calculate the heat of formation of `CH_(3)COOH `(l) at `25^(@)C` from the following data :
`CH_(3)COOH (l)+2O_(2)(g) to 2CO_(2)+2H_(2)O (l), DeltaH=-208.34 kcal`
`C(s)+O_(2)(g) to CO_(2)(g), DeltaH=-94.05 kcal`
`H_(2)(g)+(1)/(2)O_(2) to H_(2)O(l), DeltaH=-68.32 kcal`

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The correct Answer is:
(-116.4 kcal)
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