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Chapter 20: Q. 8 (page 566)

The two containers of gas in FIGURE Q20.8 are in good thermal

contact with each other but well insulated from the environment. They

have been in contact for a long time and are in thermal equilibrium.

a. Is vrms of helium greater than, less than, or equal to vrms of

argon? Explain.

b. Does the helium have more thermal energy, less thermal

energy, or the same amount of thermal energy as the argon?

Explain.

Short Answer

Expert verified

The solution gives thermal equilibrium

good thermal

contact with each other

Step by step solution

01

Description on thermal energy

It deals with the energy related to the temperature.

02

Description on the solution 

Provided solutionνrms=3kbTmmoleculesνrms∞T,νrms∞1mmolecules

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Most popular questions from this chapter

Two containers hold several balls. Once a second, one of the balls is chosen at random and switched to the other container. After a long time has passed, you record the number of balls in each container every second. In 10,000s, you find 80times when all the balls were in one container (either one) and the other container was empty.

a. How many balls are there?

b. What is the most likely number of balls to be found in one of the containers?

For a monatomic gas, what is the ratio of the volume per atom (V/N)to the volume of an atom when the mean free path is ten times the atomic diameter?

6. Suppose you could suddenly increase the speed of every molecule in a gas by a factor of 2.

a. Would the RMS speed of the molecules increase by a factor of 21/2,2,or22? Explain.

b. Would the gas pressure increase by a factor of 21/2,2or 22? Explain.

A mad engineer builds a cube,2.5mon a side, in which 6.2-cmdiameterrubber balls are constantly sent flying in random directions by vibrating walls. He will award a prize to anyone who can figure out how many balls are in the cube without entering it or taking out any of the balls. You decide to shoot 6.2-cmdiameter plastic balls into the cube, through a small hole, to see how far they get before colliding with a rubber ball. After many shots, you find they travel an average distance of 1.8m. How many rubber balls do you think are in the cube?

The rms speed of the atoms in a 2.0g sample of helium gas is 700m/s. What is the thermal energy of the gas?
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