58. Given: A(s) + B(l) <=> C(g) + D(g) ΔH° = 84.3 kJ.

If the above reactants and products are contained in a closed vessel and the reaction system is at equilibrium, the number of moles of C can be decreased by which of the following? (Note that the reactants are solid and liquid.)

The following rate constants were obtained in an experiment in which the decomposition of gaseous N₂O₅ was studied as a function of temperature. The products were NO₂ and NO₃.

   T (^oC)           k (s^-1)       

   47            0,45

   81            7,0

Determine the rate constant (s^-1) for this reaction at 149 ^oC.  

47. Which of the following occurs when reactants are added to a chemical reaction in solution or the gas phase at equilibrium?

8. If the reaction quotient Q has a smaller value than the related equilibrium constant, K, __________

57. Given the following reaction at equilibrium, which of the following alterations will increase the amount (in moles) of SO2Cl2:

SO2(g) + Cl2(g) <=> SO2Cl2(g) ΔH° = -67 kJ

4. A chemical equilibrium may be established by starting a reaction with __________

49. Which of the following occurs when products are removed from a chemical reaction in solution or the gas phase at equilibrium?

44. The following energy profiles for four different reactions are shown. Which reaction is the most exothermic?