Solved: The decomposition of NH3 to N2 and H2 was studied
Chapter , Problem 68(choose chapter or problem)
The decomposition of NH3 to N2 and H2 was studied on two surfaces: Cl _ O3!ClO _ O2 CCl2F2!hv CF2Cl _ Cl 25C O31g2 _ O1g2!2O2 Overall reaction O31g2 _ O1g2!2O21g2 NO21g2 _ O1g2!NO1g2 _ O21g2 O31g2 _ NO1g2!NO21g2 _ O21g2 Without a catalyst, the activation energy is 335 kJ/mol. a. Which surface is the better heterogeneous catalyst for the decomposition of NH3? Why? b. How many times faster is the reaction at 298 K on the W surface compared with the reaction with no catalyst present? Assume that the frequency factor A is the same for each reaction. c. The decomposition reaction on the two surfaces obeys a rate law of the form Rate _ k 3NH3 4 3H2 4 How can you explain the inverse dependence of the rate on the H2 concentration?
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