Question

Which of the following is incorrect about the reaction `:`
`underset((Diamon d))(C+O_(2(g))rarr CO_(2(g)), DeltaH=-94.3kcal` at `25^(@)C` and `1 atm` ?
A. Heat of combustion of `C=-94.3kcal`
B. Heat of formation of `CO_(2)=-94.3kcal`
C. `DeltaH=DeltaU`
D. Standard heat of formation of `CO_(2)=-94.3kcal`

Answer 1

Correct Answer - D
Standard heat of formation of a chemical is defined as the heat enthalpy change when 1 mole of a substance is formed from its most stable allotropic form. `C_(graph ite)` is most stable allotropic form having `H^(@)C_((graph ite))=0`