Problem: (a) Calculate the rms speed of a helium atom at 0°C.(b) Determine how many times per second it would move back and forth across a 7.0 m long room on the average, assuming it made very few collisions with other molecules.

FREE Expert Solution

(a) Rms speed:

vrms=3RTM

For Helium, M = 4g = 4 ×10-3 kg, R = 8.314 J/mol K (gas constant), and T = 0 + 273.15 = 273.15 K.

Substituting:

View Complete Written Solution
Problem Details

(a) Calculate the rms speed of a helium atom at 0°C.

(b) Determine how many times per second it would move back and forth across a 7.0 m long room on the average, assuming it made very few collisions with other molecules.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Kinetic Energy and Temperature concept. You can view video lessons to learn Kinetic Energy and Temperature. Or if you need more Kinetic Energy and Temperature practice, you can also practice Kinetic Energy and Temperature practice problems.