7. Gases

Root Mean Square Speed

7. Gases

# Root Mean Square Speed - Video Tutorials & Practice Problems

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**Root Mean Square Speed **allows for the determination of the velocity of 1 type of gas molecule.

Root Mean Square Speed

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concept

## Root Mean Square Speed

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example

## Root Mean Square Speed Example 1

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Problem

ProblemDetermine which gas would have a root mean square speed of 515.59 m/s at 405 K.

A

Cl

_{2}B

CO

_{2}C

F

_{2}D

NH

_{3}E

CH

_{4}4

Problem

ProblemThe root mean square speed of gas molecules is 283.0 m/s at a given temperature T when the recorded molar mass is 42.0 g/mol. What would be the root mean square speed for a gas with a molar mass of 152.0 g/mol?

A

103.7 m/s

B

128.2 m/s

C

148.8 m/s

D

177.2 m/s

E

205.1 m/s

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PRACTICE PROBLEMS AND ACTIVITIES (13)

- The coldest temperature recorded at ground level on Earth was -89.2 °C at the Vostok Station in Antarctica. Wh...
- Radon (Rn) is the heaviest (and only radioactive) member of the noble gases. How much slower is the root-mean-...
- The temperature of a 5.00-L container of N2 gas is increased from 20 °C to 250 °C. If the volume is held const...
- (b) Calculate the rms speed of CO molecules at 25 °C.
- Calculate the root mean square velocity of F2, Cl2, and Br2 at 298 K.
- The average temperature at an altitude of 20 km is 220 K. What is the average speed in m/s of an N2 molecule ...
- Calculate the average speed of a nitrogen molecule in m/s on a hot day in summer 1T = 37 °C2 and on a cold da...
- At what temperature (°C) will xenon atoms have the same average speed that Br2 molecules have at 20° C?
- At what temperature does the average speed of an oxygen molecule equal that of an airplane moving at 580 mph?
- Which has a higher average speed, H2 at 150 K or He at 375 °C?
- Which has a higher average speed, a Ferrari at 145 mph or a gaseous UF6 molecule at 145 °C?
- A big-league fastball travels at about 45 m/s. At what temperature (°C) do helium atoms have this same average...
- You have a sample of gas at 0 C. You wish to increase the rms speed by a factor of 3. To what temperature shou...