The Reaction 2NO(g)+ O₂(g) $\rightarrow$ 2NO₂(g)has $\Delta$ H_r ^$\circ$ = -114 KJ $\rightarrow$ 2NO₂(g)
Slow,k
If the Activation Energy for the Reverse Reaction

question 35

Multiple Choice

The reaction 2NO(g) + O₂(g) $\rightarrow$ 2NO₂(g) has $\Delta$ H_r ^$\circ$ = -114 kJ.mol^-1.A possible mechanism for this reaction is 2NO(g) →N₂O₂(g)
Rapid equilibrium,K
N₂O₂(g) + O₂(g) $\rightarrow$ 2NO₂(g)
Slow,k
If the activation energy for the reverse reaction is 225 kJ.mol^-1,what is the activation energy for the forward reaction?

• A)Because an intermediate is involved,the forward activation energy cannot be calculated with the given information.
• B)111 kJ.mol^-1
• C)339 kJ.mol^-1
• D)114 kJ.mol^-1
• E)55.5 kJ.mol^-1

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