For the reaction 2SO2(g) + O2(g) doubleheadarrow 2SO3(g) Delta H = -198 lJ carri
ID: 518453 • Letter: F
Question
For the reaction 2SO2(g) + O2(g) doubleheadarrow 2SO3(g) Delta H = -198 lJ carried at constant volume, the concentration of O2 at equilibrium will increase if: A. SO2 is added to the system B. SO2 is removed out of the system. C. SO3 is removed out of the system. D. heat is removed from the system. The reaction: 2H2(g) + 2NO rightarrow 2 H2O(g) + N2(g) is first-order in H2 and second-order in NO at a particular temperature. What is the Rate Law for this reaction? A. Rate = k[H2][NO] B. Rate = k[H2]2 [NO] C. Rate = k[H2O]2[N2] D. Rate = k[H2][NO]2 E. Rate = k[H2]2[NO]2 Which of the following would NOT increase the rate of reaction? A raising the temperature B. adding a catalyst C. increasing the concentration of reactants D. increasing the surface area of a solid reactant E. increasing the volume of the container for a gaseous reaction. A catalyst functions by: A. lowering the energy of the reactants. B. lowering the energy of the products. C. providing a reaction path with a lower activation energy D. increasing the equilibrium constant. E. decreasing the rate of the reverse reaction.Explanation / Answer
6) Rate law says that the rate is proportional to the product of concentration of reactants raised to some power (order)
Order of the reaction doesnot depend on stochiometry.
Given the order with respect to H2 = 1
the order with respect to NO = 2
therefore rate law = k[H2]*([NO]2)
7) Addition of Catalyst just lowers the activation energy. it doesn't initiate and alter the reaction rate.
Rate of reaction is a function of Temperature ( since k is a function of Temperature)
Rate of reaction alters by changing the concentration of reactants
Rate can be expressed per area basis per volume basis and per weight basis
so any of the area/volume/weight change will results in change in rate of reaction.
8) The main function of the catalyst is creating a path for reaction with a lower activation energy than the usual one
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