METO
434: Air Pollution
Homework
Set #1
NAME:
__________________________________________
Due: February 14, 2007
Note:
This and all subsequent homework contains some twist or "trick" to
ensure that you look at it prior to
1. (4 points) Fill in the following table;
assume STP.
|
Gas/Unit |
g/m3 |
molecules/cm3 |
ppm |
ppb |
% |
|
SO2 |
30 |
|
|
|
|
|
NO |
|
2.0E15 |
|
|
|
|
NO2 |
|
|
|
1.9 |
|
|
CO |
|
|
47 |
|
|
If
the temperature now goes up to 25°C at constant pressure, how will the concentration of NO
change?
2.
(3 points) Measure the approximate number
of molecules in a normal breath of air.
Report how you made this measurement.
If your breath is completely mixed with the entire atmosphere, how many
molecules from the first breath will you re-breathe on your next breath? Estimate how many molecules you will breathe
in a lifetime. In your next breath how
many molecules will have once been in the lungs of Achilles who died at the age
of 42? Assume the atmosphere conserves
all air molecules.
3.
(3 points) Calculate the numeric value of o, the dry adiabatic lapse
rate in units of K/km using the following expression and g and Cp in
units of m/s2 and cal/mole K:
o = -g/Cp
Show
your unit analysis