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Back to 13.4 Kinetic Theory: Atomic and Molecular Explanation of Pressure and Temperature

13.4 Exercise 2

Avg difficulty 2.5

Two samples of ideal gas in separate containers have the same number of molecules and the same temperature, but the molecular mass of gas X is greater than that of gas Y. Which of the following correctly compares the average speed of the molecules of the gases and the average force the gases exert on their respective containers?

Average Speed of MoleculesAverage Force on Container
(a)Greater for gas XGreater for gas X
(b)Greater for gas XThe forces cannot be compared without knowing the volumes of the gases.
(c)Greater for gas YGreater for gas Y
(d)Greater for gas YThe forces cannot be compared without knowing the volumes of the gases.

OpenStax College Physics 2e, 13.4 Kinetic Theory: Atomic and Molecular Explanation of Pressure and Temperature, exercise 2

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Adapted from College Physics © 2022 Rice University. Licensed under CC BY 4.0. Sources: College Physics 2e, College Physics for AP® Courses 2e. Imported at revision f98d7a7.