For parts of the free-response question that require calculations, clearly show the method used and the steps involved in arriving at your answers. You must show your work to receive credit for your answer. Examples and equations may be included in your answers where appropriate. 2NO2(g)+F2(g)NO2F(g)Hr=n=284kJ/molrn NO2(g) and F2(g) can react to produce NO2F(g), as represented above. A proposed mechanism for the reaction has two elementary steps, as shown below. Step 1: NO2+F2NO2F+F( slow) Step 2. NO2+FNO2F (fast) (a) Write a rate law for the overall reaction that is consistent with the proposed mechanism. (b) On the incomplete reaction energy diagram below, draw a curve that shows the following two details. The relative activation energies of the two elementary steps The enthalpy change of the overall reaction