1.

The heat of combustion of carbon is -94 kcal at 1 atm pressure. The intrinsic energy of CO_(2) is

Answer»

`+94` kcal
`-94` kcal
`+47` kcal
`-47` kcal

Solution :`C_((S))+O_(2)(g)rarrCO_(2(g)), Deltan_(g)=1-1=0`
`THEREFORE DeltaE=DeltaH=-94 kcal`
`DeltaE=E_(CO_(2))-(E_(C)+E_(O_(2)))=E_(CO_(2))-(0+0)`
`or E_(CO_(2))=DeltaE=-94 kcal`.


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