Explanation According Kinetic-molecular theory, the average kinetic energy of gas particles and the Kelvin temperature is proportional. Here, the temperature is same for all the gas samples and hence, the average kinetic energy will be same. Kinetic energy depends on mass and velocity of the particle. E k = 1 2 mv 2 v 2 = 2K .E m Thus, from the above equation it is clear that molecule having lesser mass will have faster molecular speed. Decreasing order of average molecular speed is shown below, Molar Mass F a s t e s t H 2 2 H e 4 C H 4

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Chapter 8, Problem 65QRT

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Interpretation:

Decreasing order of average molecular speed of the gases should be listed. Gas that most probably like to escape gravitational field of Earth has to be given.

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Chapter 8, Problem 64QRT

Chapter 8, Problem 66QRT

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Chapter 8 Solutions

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Ch. 8.1 - Prob. 8.1PSP Ch. 8.1 - Prob. 8.1E Ch. 8.1 - Prob. 8.2E Ch. 8.2 - Prob. 8.3CE Ch. 8.2 - Prob. 8.4CE Ch. 8.3 - Prob. 8.6CE Ch. 8.3 - Prob. 8.2PSP Ch. 8.3 - Prob. 8.3PSP Ch. 8.3 - Prob. 8.4PSP Ch. 8.3 - Prob. 8.7CE

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Decreasing order of average molecular speed of the gases should be listed. Gas that most probably like to escape gravitational field of Earth has to be given.

Solution Summary: The author explains Kinetic-molecular theory, wherein the average kinetic energy of gas particles and Kelvin temperature is proportional. The molecule having lesser mass will have faster molecular speed.

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Interpretation: Decreasing order of average molecular speed of the gases should be listed. Gas that most probably like to escape gravitational field of Earth has to be given.

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Chapter 8 Solutions

Interpretation:

Decreasing order of average molecular speed of the gases should be listed. Gas that most probably like to escape gravitational field of Earth has to be given.