Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Transcribed Image Text:The van der Waals equation of state was designed (by Dutch physicist Johannes van der Waals) to predict the relationship
between pressure p, volume V and temperature T for gases better than the Ideal Gas Law does:
p+a-
|(V-nb) = nRT The van der Waals equation of state. R stands for the gas constant and n for
moles of gas.
The parameters a and b must be determined for each gas from experimental data.
Use the van der Waals equation to answer the questions in the table below.
Ar
What are the units of a?
What are the units of b?
For water the numerical value of a is 5.464 and the numerical
value of b is 0.0305.
Oat
||atm
Use the van der Waals equation to calculate the pressure of a
sample of water at 430.0 °C with a molar volume of 4.03 L/mol.
Round your answer to the correct number of significant digits.
Use the Ideal Gas Law to calculate the pressure of the same
sample under the same conditions. Round your answer to the
correct number of significant digits.
atm
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