1. Acetic acid, CH3COOH, freezes at 16.6ºC. The heat of fusion, DHfus, is 69.0 J/g. What is the change of entropy, DS, when 1 mol of liquid acetic acid freezes to the solid at its freezing point? (carefully note the units on DHfus)
2. A solution contains 0.100 M Ce3+, 1.00 x 10-4 M Ce4+, 1.00 x 10-4 M Mn2+, 0.100 M MnO4- and has a pH = 0.
a) write a balanced net reaction that can occur between species in this solution.
b) calculate DGº and K for the reaction.
c) calculate E for the conditions given.
d) Calculate DG for the conditions given.
e) At what pH would the given concentrations of the other ions be in equilibrium at 298 K?
3. The following data were obtained for the reaction of NO with O2.
[NO] initial [O2] initial rate
0.07 0.07 1.2 x 10-3
0.14 0.07 4.8 x 10-3
0.21 0.07 1.1 x 10-2
0.07 0.14 2.4 x 10-3
What is the rate law for this reaction?