December 2, 2020

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:

Now we know are methods are correct and can use them for Problem 3-3

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

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

b) Now determine the evaporation rate per unit rea for this

mixture

c) the ventilation rate (Equation 3-9) reqired to keep the concentration below

the TLV.

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

b) Concentration of toluene (in ppm) near the drum if the local

ventilation rate is 28.34 cu m per min.

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