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Calculate the enthalpy of formation of l...

Calculate the enthalpy of formation of liquid ethyl alcohol from the following data.
`C_(2)H_(5)OH(l)+3O_(2)(g)to2CO_(2)(g)+3H_(2)O(l),DeltaH=-1368kJ`
`C(s)+O_(2)(g)toCO_(2)(g),DeltaH=-393kJ`
`H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l),DeltaH=-287kJ`.

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