A student in your class was given the reaction equations below:

C_(s) + O_2(g) CO_2(g) H = 393.5 kJ

2 H_2(g) + O_2(g) 2 H₂O _(g) H = 483.6 kJ

2 C_(s) + 3 H_2(g) + 2 O_2(g) + N_2(g) 2 CH₃NO_2(g) H = 226.2 kJ

The student was then asked to determine the enthalpy of the following reaction:

4 CH₃NO_2(g) + 3 O_2(g) 4 CO_2(g) + 2 N_2(g) + 6 H₂O_(g)

Draw a labelled potential energy diagram to represent this reaction