CHM 1046                      QUIZ  4               September 27, 1996


     This quiz is take-home and open book, and it is intended that
all members of the group contribute to completing it.  Only one
copy is to be submitted by the group, and all members who
participated should sign their names below.  Test is due by start
of class on Monday, September 30.

                   List names in alphabetical order!

_______________________  _______________________

_______________________  _______________________

_______________________  _______________________

Points

(4)1. Write the expression for the equilibrium constant of the
      following reaction:

Al2(SO3)3(s) + 6 HCl (g)  þ  2 AlCl3(s) + 3 H2O (g) + 3 SO2 (g)







2.    The following reaction was carried out at 25 oC with the
      initial concentration of NO2 being 0.55 mol/L, with no NO or
      O2 present.  At equilibrium, the NO2 concentration was found
      to be 0.21 mol/L.  

           2 NO2(g)  þ    2 NO (g)   +    O2(g)

(6)   (a)  Calculate Kc for the reaction.














(3)   (b)  Calculate Kp for the reaction.










(7)3. Kc for the following reaction is 0.070.   Calculate the
      equilibrium concentration (in mol/L) of each reactant and
      product if the initial concentration of C4H10 is 0.075 M, with
      no C2H6 or C2H4 present initially.

           C4H10(g)   þ   C2H6(g)    +   C2H4(g)