
(a)
Interpretation:
The diffusion constant for
Concept introduction:
The diffusion of any gas particle among its own gas particles is known as self-diffusion. The diffusion constant is directly proportional to the product of mean free path and average velocity. The self-diffusion of a particle is given as,
Where,
•
•
•
•
•
•

Answer to Problem 19.62E
The diffusion constant of helium is
Explanation of Solution
It is given that the helium is at
The diffusion constant can be calculated by the formula,
Where,
•
•
•
•
•
•
The diffusion constant can be represented in the terms of pressure as,
Substitute the values of molar mass, diameter, pressure, gas constant and temperature.
The unit of pressure is converted from
The conversion factor of
Substitute the units of pressure and solve the square root as shown below.
The units of diffusion constant are usually expressed in
The diffusion constant of helium is
(b)
Interpretation:
The diffusion constant for
Concept introduction:
The diffusion any gas particle among its own gas particles is known as self-diffusion. The diffusion constant is directly proportional to the product of mean free path and average velocity. The self-diffusion of a particle is given as,
Where,
•
•
•
•
•
•

Answer to Problem 19.62E
The diffusion constant of xenon is
Explanation of Solution
It is given that the xenon is at
The diffusion constant can be calculated by the formula,
Where,
•
•
•
•
•
•
The diffusion constant can be represented in the terms of pressure as,
Substitute the values of molar mass, diameter, pressure, gas constant and temperature.
The units of pressure are converted from
The conversion factor of
Substitute the units of pressure and solve the square root as shown below.
The units of diffusion constant are usually expressed in
The diffusion constant of xenon is
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Chapter 19 Solutions
PHYSICAL CHEMISTRY-STUDENT SOLN.MAN.
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- The reaction for obtaining NO2 from NO and O2 has the rate equation: v = k[NO]2[O2]. Indicate which of the following options is correct.(A). This rate equation is inconsistent with the reaction consisting of a single trimolecular step.(B). Since the overall order is 3, the reaction must necessarily have some trimolecular step in its mechanism.(C). A two-step mechanism: 1) NO + NO ⇄ N2O2 (fast); 2) N2O2 + O2 → NO2 + NO2 (slow).(D). The mechanism must necessarily consist of three unimolecular elementary steps with very similar rate constants.arrow_forwarda. What is the eluent used in the column chromatography here (a “silica plug filtration” is essentially a very short column)? b. The spectroscopy of compound 5b is described in the second half of this excerpt, including 1H-NMR and 13C-NMR (which you will learn about in CHEM 2412L), MS (which you will learn about later in CHEM 2411L) and IR. One of the IR signals is at 3530 cm-1. What functional group does this indicate might be present in compound 5b?arrow_forwardSteps and explanations. Also provide, if possible, ways to adress this kind of problems in general.arrow_forward
- a. The first three lines of this procedure describe the reaction used to make compound 5b. In the fourth line, hexane and sodium bicarbonate are added. What organic lab technique is being used here? b. What is the purpose of the Na2SO4? c. What equipment would you use to “concentrate [a solution] under reduced pressure”?arrow_forwardWhen N,N-dimethylaniline is treated with bromine both the ortho and para products are observed. However when treated with a mixture of nitric acid and sulfuric acid only the meta product is observed. Explain these results and support your answer with the appropriate drawings *Hint amines are bases* N HNO3 H2SO4 N NO2 N Br2 N Br + N 8-8-8 FeBr3 Brarrow_forwardDraw a mechanism that explains the formation of compound OMe SO3H 1. Fuming H2SO4arrow_forward
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