The standard enthalpy of diamond is zero at `298K` and `1 atm` pressure.

Standard enthalpy of formation is zero for

Standard enthalpy of formation is zero for

The stable state of aggregation of carbon at 298K and 1atm pressure is……………

The stable state of aggregation of carbon at 298K and 1atm pressure is……………

The stable state of aggregation of sulphur at 298K and 1atm pressure is…………….sulphur.

The stable stae of aggregation of sulpur at 298K and 1atm pressure is…………….sulphur.

The standard' enthalpy'of formation of diamond is not taken as zero, whereas that for graphite is take as zero. Give reason.

The heat of formation is the change in enthalpy accompanying the formation of a substance fiom its elements at 298 K and 1 atm pressure. Since the anthalpies of elements are taken to be zero, the heat of formation (triangleH) of compounds