Its for ideal gases derived from quantum mechanics. W
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![9.1. Consider the results for ideal gases derived from quantum mechanics. Write an
expression for the function s(T, v) that includes the parameter A(T).
(a) Show that the behavior of the entropy as T0 is unrealistic in a quantum
sense. What approximation in the derivation is responsible for this behavior?
(b) The Sackur-Tetrode equation is valid when the thermal de Broglie wave-
length is much less than the average molecular separation distance, A(T) <
(V/N)13, which is generally the case at high temperatures. Calculate the
temperature at which this inequality is first violated for an ideal gas at
atmospheric pressure and with a mass of 6.6 × 10-26 kg/molecule (which is
typical of argon).
x](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5475162a-1516-498b-b7d8-fd80b395d07f%2Fc367f39e-7936-486c-a5b5-fb3cd6437c3c%2Fcf5wu5j_processed.jpeg&w=3840&q=75)
Transcribed Image Text:9.1. Consider the results for ideal gases derived from quantum mechanics. Write an
expression for the function s(T, v) that includes the parameter A(T).
(a) Show that the behavior of the entropy as T0 is unrealistic in a quantum
sense. What approximation in the derivation is responsible for this behavior?
(b) The Sackur-Tetrode equation is valid when the thermal de Broglie wave-
length is much less than the average molecular separation distance, A(T) <
(V/N)13, which is generally the case at high temperatures. Calculate the
temperature at which this inequality is first violated for an ideal gas at
atmospheric pressure and with a mass of 6.6 × 10-26 kg/molecule (which is
typical of argon).
x
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