Chapter 12 Environmental Chemical Reactions and Transformations Notes
There are more than 70,000 synthetic chemicals that are in daily use.
solvents
components of detergents
dyes and varnishes
additives in plastics and textiles
chemicals used for construc

Quiz 1
Question 1. (20 points) You must answer this question.
Consider two particles. One is 0.02 m in diameter; the other is 20 m in diameter.
Assume spherical shape, 20oC and 1 atmosphere pressure. Unless otherwise stated,
assume the particles are water

Practice Final Exam
ENVR 145 Introduction to Aerosol Science Final Examination, Fall 1998Please answer
questions 1 through 5 and any two of questions 6, 7, and 8. If you answer more than two
of questions 6, 7, and 8, we will grade the first two you answer

Practice Exam 2
1.(20 points total)Answer the following questions:
a) (7 points)Assume the only forces acting on a charged particle in an electric field are an
electrical force, gravitational force, and the Stokes law drag force.Develop an equation
for th

ENVR 391
Practice Exam 1
Question 1: Agencies involved in Environmental Health
A. List and describe the major agencies that are concerned with environmental health in
the USA. What are their missions, what are their roles?
B. How much do their roles overl

HW chapter 7 answers
question 1
1,2,4-tri Chlorobenzene 1,2,4TCB has a logKiow =
4.06
from new book page 219
assume K ihex,w for hexane is the same as for hexadecane (K ihexdecane,w ) in your book
(this is an assumption, but is reasonable based on the log

Homework Chapter 9
Question 1
D= RT/(f N)
f= Stokes law = 6x x n x r/Co
Co= Cunninghams slip factor
R=
8.31 J/Lmol=
8.31E+07 ergs/(deg mol)
T=
298.00 oC
N=
6.02E+23 Avagadro's#
= 3.14
n
1.83E-04 g/(cmx sec) = poise
assume viscosity of is the same at 20 an

Chapter 6 homework
3. A Fugacity problem (first some additional theory )
In a compartment, C i, the rate of decay in moles m-3 year-1 for a given
process, j, is
rateCi = kj[Ci]
where kj =
bio degradation
photolysis
hydrolysis
oxidation
advection
etc.
rate

Homework 4
Question 1
Vapor pressures using a constant entropy = 88 J/(K x mol)
This gives starting with Eq 4-33
lnPo = 19(1-Tb/T)+0 .8ln(Tb/T)
[inin tm] if the the boiling pt is computed at 1 bar, or atmspheres
a bars
if the boiling pt was taken at 1 atm

Review
Chapter 2 know general structures
Chapter 3
Much of this class deals with the partitioning
of an organic compound i between two
phases
A+B C
Keq = [C]/cfw_[A][B]
Keq = [ iphase1]/[ iphase 2]
When we deal with air liquid partitioning
KiaL = Cia/CiL

Quiz 2
1. In this problem, assume the size distribution is polydisperse unless the question states
otherwise. Then, for each question, circle TRUE or FALSE. Each question is worth 2.5
points.
a. A log-normal distribution is the only cumulative distributio