Chemistry 132, Winter 2008 Solutions to Homework No. 1
Problem 1.
See Levine problem 11.1. (a) True. The activity of component i in a reaction mixture is defined in terms of an exponential function, which is di mensionless: ai = e(i i )/RT (Levine e
Chemistry 132, Winter 2008 Solutions to Homework No. 2
Problem 1.
See Levine problem 12.1. (a) True. Addition of a solute B at constant T and P to pure solvent A decreases the mole fraction xA of the solvent. A Since A > 0 (Levine eq. 4.90), then add
CHEM 132 Homework #1 (due 04/13/2017)
, (b) the standard Gibbs
1. Determine: (a) the standard cell potential Ecell
free energy g , and (c) the equilibrium constant K for the following
reaction at 25 C:
P b(s) + 2H + (aq) *
) P b2+ (aq) + H2 (g)
The standa
CHEM 132 Homework #2 (due 04/20/2017)
1. Estimate the fraction of the nitrogen molecules that have speeds v at
500 K in the range 290 m/s to 300 m/s.
Hint: The interval is small enough to be considered infinitesimal.
2. True or false? (explain)
(a) For a
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CHEM 132 Homework #5 (due 05/18/2017)
1. A second order reaction 2A products with rate coefficient k is 50%
complete in 50 min. The initial concentration of A is 5 103 mol/dm3 .
Is there enough information here to calculate the concentration of A
after an
CHEM 132 Homework #4 (due 05/04/2017)
1. Interstellar space is a medium quite different from the gaseous environments we commonly encounter on Earth. For instance, a typical
density of the medium is about 1 atom cm3 and that atom is typically H; the effec
CHEM 132 Homework #3 (due 04/27/2017)
1. Naturally occurring hydrogen consists of 99.985 mol % 1 H 1 isotope and
0.015 mol % 1 H 2 isotope (known as deuterium, designated 1 D2 ). These
two isotopes gradually can be separated using a large series of effusi
CHEM 132
MIDTERM EXAM
K. Lindenberg Winter 2007
STUDENT ID
_
1.
/8 /16 /7 /21 /10 /27 /105
TAL MIDTERM
TOTAL NUMBER OF PAGES INCLUDING THIS COVER PAGE: 13. NOTE: As announced, this exam is based on homeworks and book examples, with details chan
Chemistry 132, Winter 2008 Solutions to Homework No. 3
Problem 1.
See Levine problem 14.12. (a) True. Taking the derivative of E (Levine eq. 14.41) with respect to the activity aj of substance j gives E /aj = j RT /nF aj , which is negative when j >
(1.15) True. The distribution function for vx , g(vx ), has a maximum at vx = 0 (Levine p. 469) independently of the type of gas. Since all velocity components have the same distribution function (Levine p. 463), the most probable Problem 1. value of
Chemistry 132, Winter 2008 Solutions to Homework No. 5
Problem 1.
Given n possible values xi , i = 1 n, of a discrete random variable X, and given a function f (X) of the variable X, the average value of f (X) is (Levine eq. 15.40)
n
Figure 1: Ex
Chemistry 132, Winter 2008 Solutions to Homework No. 6
Problem 1.
See Levine problem 16.6. (a) False. By integrating Newton's viscosity law (Levine eq. 16.15) it can be shown that for a layer with radius s the velocity vy along the pipe is a paraboli
Chemistry 132, Winter 2008 Solutions to Homework No. 7
Problem 1.
See Levine problem 17.1.
products. Neither an intermediate nor a catalyst appears in the overall reaction. A reaction intermediate first appears as the product of a step of the mechan
Chemistry 132, Winter 2008 Solutions to Homework No. 8
Problem 1.
See Levine problem 17.44. (a) Assume a rate law of the form r = k[A] [B] [E] (Levine eq. 17.5), where A, B, and E represent ClO , Cl , and OH , respectively. Let ri denote the initi
Chemistry 132, Winter 2008 Solutions to Homework No. 9
Problem 1.
In a chain reaction, the chain carriers are reactive intermediates that occur in chain propagation steps (Levine p. 565). A step that generates chain carriers from relatively unreactiv
Chemistry 132, Winter 2008 Solutions to Homework No. 10
Problem 1.
See Levine problem 22.54. Solve for N2 , at T = 300 K with rot = 2.86 K and zrot = 51.0. (a) The fraction of molecules in the rotational energy level corresponding to quantum number J