Answer :
The enthalpy change for the formation step of this intermediate is 136 kJ/mol.
What is the enthalpy?
The enthalpy of reaction can be obtained from the enthalpies of formation of the species involved. The enthalpy of reaction is the heat evolved or absorbed in a reaction.
Thus, the enthalpy change for the formation step of this intermediate is 4 * 34 kJ/mol = 136 kJ/mol.
Learn more about enthalpy change:https://brainly.com/question/4526346
#SPJ1