Calculate the Standard Reaction Enthalpy for the Following
Reaction $\rightarrow$

Calculate the standard reaction enthalpy for the following
reaction:
2NO₂(g) $\rightarrow$ 2NO(g) + O₂(g)
From the standard reaction enthalpies of
N₂(g) + O₂ $\rightarrow$ 2NO(g)
$\Delta$ H° = +180.5 kJ.mol^-1
2NO₂(g) $\rightarrow$ N₂(g) + 2O₂(g)
$\Delta$ H° = -66.4 kJ.mol^-1

A) (-114.1 kJ.mol^-1 )
B) (-246.9 kJ.mol^-1 )
C) (+114.1 kJ.mol^-1 )
D) (-294.6 kJ.mol^-1 )
E) (+246.9 kJ.mol^-1 )