EBK ELEMENTARY PRINCIPLES OF CHEMICAL P
4th Edition
ISBN: 9781119192107
Author: BULLARD
Publisher: JOHN WILEY+SONS,INC.-CONSIGNMENT
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Textbook Question
Chapter 5, Problem 5.53P
5.53.20 Chemicals are stored in a laboratory with volume V(m3). As a consequence of poor laboratory practices, a hazardous species, A, enters the room air (from inside the room) at a constant rate 
The room is ventilated with clean air ?owing at a constant rate 
The average concentration of A in the room air builds up until it reaches a steady-state value 
(a) List at least four situations that could lead to A getting into the room air.
(b) Assume that the A is perfectly mixed with the room air and derive the formula
(c) The assumption of perfect mixing is never justi?ed when the enclosed space is a room (as opposed to, say, a stirred reactor). In practice, the concentration of A varies from one point in the room to another: it is relatively high near the point where A enters the room air and relatively low in regions far from that point, including the ventilator outlet duct. If we say that 
where 
is a nonideal mixing factor (generally between 0.1 and 0.5, with the lowest value corresponding to the poorest mixing). then the equation of Part (b) becomes
Use this equation and the ideal-gas equation of state to derive the following expression for the average mole fraction of A in the room air:
where MA is the molecular weight of A.
(b) The permissible exposure level (PEL) for styrene (M = 104.14) de?ned by the U.S. Occupational Safety and Health Administration is 50 ppm (molar basis).21 An open storage tank in a polymerization laboratory contains styrene. The evaporation rate from this tank is estimated to be 9.0 g/h. Room temperature is 20°C. Assuming that the laboratory air is reasonably well mixed (so that k = 0.5), calculate the minimum ventilation rate (m3/h) required to keep the average styrene concentration at or below the PEL. Then give several reasons why working in the laboratory might still be hazardous if the calculated minimum ventilation rate is used.
(e) Would the hazard level in the situation described in Part (d) increase or decrease if the temperature in the room were to increase? (Increase, decrease, no way to tell.) Explain your answer, citing at least two effects of temperature in your explanation.
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Explain in terms of the Kinetic Molecular Theory the following situations:
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The ideal gas law describes the relationship among
the volume of an ideal gas (V), its pressure (P), its
absolute temperature (T), and number of moles (
n):
PV = nRT
Under standard conditions, the ideal gas law does
a good job of approximating these properties for
any gas. However, the ideal gas law does not
account for all the properties of real gases such as
intermolecular attraction and molecular volume,
which become more pronounced at low
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constants a and b, which are unique to each
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an²
The gas constant R is equal to 0.08206
L.atm/(K-mol).
Part A
A 3.00-L flask is filled with gaseous ammonia, NH3. The gas pressure measured at 16.0 °C is 2.45 atm . Assuming
ideal gas behavior, how many grams of ammonia are in the flask?
Express your answer to three significant figures and include the appropriate units.
View Available Hint(s)
mass of NH3 =
Submit
▾ Part B
HÅ…
3. (77, 87, 133) The complete combustion of ethanol is performed according to the reaction given below in a
sealed rigid 450.0L container. Before the reaction begins the pressure is 2.3atm and the temperature is 298K.
At the conclusion of the reaction the pressure is 3.1atm and the temperature is maintained at 298K
C,H5OH(1) + 302(g) → 2CO2(g) + 3H20(g)
a. Which species is the limiting reactant?
b. At the end of the reaction which gas species are present?
c. Calculate the partial pressure, in atm, of each gas present at the end of the reaction.
d. What mass, in g, of ethanol was consumed?
e. Provide a ranking of the rate of effusion from slowest to fastest for the three gases.
4. (91) 175.0g of methane (CH4) is held in a 35.0L container at 195K.
a. Calculate the real pressure of the gas, in atm, using the van der Waals values given in Table 10.4. Report
with 5 significant figures.
b. Calculate the ideal pressure of the gas, in atm. Report with 5 significant figures.
c. Do repulsive or…
Chapter 5 Solutions
EBK ELEMENTARY PRINCIPLES OF CHEMICAL P
Ch. 5 - A liquid mixture containing 40.0 wt% n-octane and...Ch. 5 - Prob. 5.2PCh. 5 - Prob. 5.3PCh. 5 - Prob. 5.4PCh. 5 - Prob. 5.5PCh. 5 - Prob. 5.6PCh. 5 - Prob. 5.7PCh. 5 - Prob. 5.8PCh. 5 - Prob. 5.9PCh. 5 - Prob. 5.10P
Ch. 5 - Prob. 5.11PCh. 5 - Prob. 5.12PCh. 5 - Prob. 5.13PCh. 5 - Prob. 5.14PCh. 5 - Prob. 5.15PCh. 5 - Prob. 5.16PCh. 5 - Prob. 5.17PCh. 5 - Prob. 5.18PCh. 5 - Prob. 5.19PCh. 5 - A device has been designed to measure the flow...Ch. 5 - Prob. 5.21PCh. 5 - Prob. 5.22PCh. 5 - Spray drying is a process in which a liquid...Ch. 5 - Prob. 5.24PCh. 5 - Lewis12 describes the hazards of breathing air...Ch. 5 - A stream of air at 35°C and a gauge pressure of...Ch. 5 - Prob. 5.27PCh. 5 - In froth ?otation, air is bubbled through an...Ch. 5 - Prob. 5.29PCh. 5 - Prob. 5.30PCh. 5 - Bread is typically made by ?rst dissolving...Ch. 5 - Prob. 5.32PCh. 5 - Prob. 5.33PCh. 5 - Prob. 5.34PCh. 5 - Prob. 5.35PCh. 5 - Prob. 5.36PCh. 5 - Prob. 5.37PCh. 5 - Prob. 5.38PCh. 5 - Prob. 5.39PCh. 5 - A spray-drying operation similar to that described...Ch. 5 - Prob. 5.41PCh. 5 - Fermentation is a biochemical process in which a...Ch. 5 - Prob. 5.43PCh. 5 - Prob. 5.44PCh. 5 - Ethane at 25°C and 1.1 atm (abs) flowing at a rate...Ch. 5 - The ?ow of air to a gas-?red boiler furnace is...Ch. 5 - Prob. 5.47PCh. 5 - The oxidation of nitric oxide NO+12O2NO2 takes...Ch. 5 - Prob. 5.49PCh. 5 - 5.50.19 In chemical vapor deposition (CVD), a...Ch. 5 - A gas turbine power plant receives a shipment of...Ch. 5 - Prob. 5.52PCh. 5 - 5.53.20 Chemicals are stored in a laboratory with...Ch. 5 - Prob. 5.54PCh. 5 - Prob. 5.55PCh. 5 - A stream of ho dry nitrogen flows through a...Ch. 5 - Prob. 5.57PCh. 5 - You have purchased a gas cylinder that is supposed...Ch. 5 - The current global reliance on fossil fuels for...Ch. 5 - Two humid gas streams are combined in a heated...Ch. 5 - Most of the concrete used in the construction of...Ch. 5 - The ultimate analysis of a No. 4 fuel oil is 86.47...Ch. 5 - A stream of liquid n-pentane flows at a rate of...Ch. 5 - Alka-Seltzer( is an over-the-counter medicine used...Ch. 5 - Hydrogen sul?de has the distinctive unpleasant...Ch. 5 - The quantity of sulfuric acid used globally places...Ch. 5 - A small power plant produces 500 MW of electricity...Ch. 5 - You have been assigned the task of measuring the...Ch. 5 - Prob. 5.69PCh. 5 - Methanol is synthesized from carbon monoxide and...Ch. 5 - Prob. 5.71PCh. 5 - Prob. 5.72PCh. 5 - Steam reforming is an important technology for...Ch. 5 - A ?owchart of a methanol synthesis process is...Ch. 5 - The measured volumetric flow rate of ethane at...Ch. 5 - Prob. 5.76PCh. 5 - Methanol is to be delivered to a process unit at a...Ch. 5 - Prob. 5.78PCh. 5 - Prob. 5.79PCh. 5 - Prob. 5.80PCh. 5 - Prob. 5.81PCh. 5 - Prob. 5.82PCh. 5 - Prob. 5.83PCh. 5 - Prob. 5.84PCh. 5 - Prob. 5.85PCh. 5 - Prob. 5.86PCh. 5 - Prob. 5.87PCh. 5 - Prob. 5.88PCh. 5 - Prob. 5.89PCh. 5 - A fuel cell is an electrochemical device that...Ch. 5 - In a metered-dose inhaler (MDI), such as those...Ch. 5 - Prob. 5.92PCh. 5 - Prob. 5.93PCh. 5 - Approximately 150 SCFM (standard cubic feet per...Ch. 5 - Prob. 5.95PCh. 5 - Prob. 5.96PCh. 5 - Prob. 5.97PCh. 5 - The product gas from a coal gasification plant...Ch. 5 - Prob. 5.99PCh. 5 - Prob. 5.100PCh. 5 - A gas mixture consisting of 15.0 mole% methane....Ch. 5 - A system has been devised to store acetonitrile...Ch. 5 - Prob. 5.103PCh. 5 - Prob. 5.104P
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