O2 Heat Of Formation

If the heat of formation of NO2 is 'x' [1/2N2 (g) + O2 (g)→NO2 (g)] the

O2 Heat Of Formation. Enthalpy change does not occur for gases in standard state. Web why is the standard enthalpy of formation of o2 equal to zero?

If the heat of formation of NO2 is 'x' [1/2N2 (g) + O2 (g)→NO2 (g)] the
If the heat of formation of NO2 is 'x' [1/2N2 (g) + O2 (g)→NO2 (g)] the

Enthalpy change does not occur for gases in standard state. Web why is the standard enthalpy of formation of o2 equal to zero?

Web why is the standard enthalpy of formation of o2 equal to zero? Web why is the standard enthalpy of formation of o2 equal to zero? Enthalpy change does not occur for gases in standard state.