(25 pts) Please answer the following questions. a. Five Rh catalysts were prepared with different sizes of Rh: single Rh atoms, 1nmRh particles, 3nm Rh particles, 5nm Rh particles, and 10nm Rh particles. These catalysts were tested for a particular reaction and under the same experimental conditions. Which of the Rh catalysts will have the highest turnover frequency? Explain your answer. b. The figure on the left is a plot of \% conversion vs. temperature for a reaction using a catalyst. Initially, there is hardly any conversion of the reactants, but as the temperature increases, there is a light-off where conversion significantly increases. Finally, as the temperature further increases, 100% conversion is reached. The figure on the right is an Arrhenius plot obtained from the conversion plot. Which region of the conversion plot would we get the Arrhenius plot? Explain your answer. The figure is a plot of \% conversion vs. temperature for a propylene oxidation reaction using a catalyst. The reactants consist of propylene/propane mixture, NO,CO, and O2. The catalyst was initially aged in N2/ steam at 980C before reaction. Between the temperatures of 150 and 275C, there is an increase in conversion followed by a decrease in conversion. After 275C, we get light-off. Explain why this "hump" occurred during propylene oxidation reaction. d. The figure is a plot of TOF vs. particle size for a cobalt catalyst. Describe the plot