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Problems and Solutions for Chapter 3
Problem 3-1
Search the internet and a) print a GHS label for phenol, b) or if having
difficulty than develop your own label, and c) draw a few conclusions..
Solution 3-1
Problem 3-2
Copy the GHS Label pictograms [2] for a) Oxidizers, b) Flammables, c)
Explosives, d) Acute toxicity, d) Corrosives, and e) Carcinogens.
Solution 3-2
End of Problem 3-2
Problem 3-3
For the following air mixture, determine the the mixture TLV and determine if
this TLV has been exceeded. The mixture contains: 4 ppm of carbon
tetrachloride with a TLV of 5 ppm, 25 ppm of 1,1-dichloroethane with a TLV of
100 ppm, 5 ppm of diethylamine witn a TLV of 5 ppm, 20 ppm of
cyclohexanol with a TLV of 50 ppm, and 10 ppm of propylene oxide with a
TLV of 2 ppm.
Solution 3-3
The following is an example problem (Example 3-2) from this 4th Edition:
5
5
Now we know are methods are correct and can use them for Problem 3-3
4
25
5
100
End of Problem 3-3
Problem 3-4
An open container was monitored and found to have a toluene evaporation rate of
0.1 g/min. The ventilation rate is 2.84 cu m/min, the temperature is 27 deg C and
the pressure is 1 atm. Estimate the concentration of toluene vapor in the
enclosure and compare it to the TLV of 50 ppm. Do this for a k of 1.0 and 0.1.
Solution 3-4
QRT
300
End of Problem 3-4
Problem 3-5
An ideal liquid mixture of benzene and toluene (50 % each) is used in a plant
at 27 deg. centigrade and 1 atm. Determine a) the mixture TLV, b) the
evaporation rate per unit area for this mixture, and c) the ventilation rate
required to keep the concentration below the TLV if the drum bung diameter
is 5.1 cm. Assume the ventilation quality within the vicinity is average.
Solution 3-5
2.058 104
20
C
b) Now determine the evaporation rate per unit rea for this
mixture
Rg T
c) the ventilation rate (Equation 3-9) reqired to keep the concentration below
the TLV.
QRT
300
End of Problem 3-5
Problem 3-6
A drum contains 0.16 cu m of toluene. If the lid is left open (lid diameter is
0.92 m) determine the a) time required to evaporate all of the toluene, and b)
concentration of toluene (in ppm) near the drum if the local ventilation rate is
28.34 cu m per min. The temperature is 85 deg. F and the pressure is 1 atm.
Solution 3-6
M
100
Qm
60
b) Concentration of toluene (in ppm) near the drum if the local
ventilation rate is 28.34 cu m per min.
QRT
End of Problem 3-6
Problem 3-7
Three railcars are being splash filled with toluene. The cars are 38 cu m in
volume, and the filling hole is 0.10 m in diameter.Estimate the concentration
of toluene in this vicinity if the ventilation rate is 85 cu m/min, The
temperature is 25 deg. C and the pressure is 1 atm.
Solution 3-7
M
100
