Calculate `DeltaH_("combustion"^(@)` of `C_("graphite")` if `DeltaH_(f)^(@)` of ace tone `=-250 kJ`, `Delta_("combustion")^(@)`of acetone `=-1760 kJ`,
`DeltaH_("combustion")^(@) " of "H_(2)(g)=-280 kJ`

Calculate the DeltaH_(f)^@ of C_(6)H_(12)O_(6) (s) from the following data: DeltaH_(comb)[C_(6)H_(12)O_(6)(s)]=-2816.kJ//mol DeltaH_(f)^(@) of CO_(2)(g)=-393.5kJ//mol DeltaH_(f)^(@) of H_(2)O(l)=-285.9kJ//mol

The values of the combustion of graphite and H_(2) are -395 and -269 kJ respectively. If heat of formation of glucose is -1169 kJ the heat of combustion of glucose is