Since their discovery in 1985 , fullerenes have received the attention of many chemical researchers. In a recentrly reported data, the specific internal energy of combustion of crystalline `C_(60)` is found to be `-36kJ g^(-1)` at `298K`. Compute the standard enthalpy of combustion and formation for the same. Standard enthalpy of combustion of graphite is `-395kJ mol^(-1)`. If the standard enthalpy of formation of diamond is `+2kJ per mol` of `C-` atom, which is more stable `:C_(60)` or diamond ?