Problem: A box contains equal amounts of helium, argon, and krypton (all gases) at 25 C. Describe the temperatures, masses, average velocities, and average kinetic energy of the three kinds of gas in the mixture. What do they have in common? What are the differences? How are these properties related? Match the words in the left column to the appropriate blanks in the sentences on the right .

FREE Expert Solution

Mass ratios:

mass ratio He:Ar=mass Hemass Ar=4.00339.95=0.10 or 1/10


mass ratio Ar:Kr=mass Armass Kr=39.9583.80=~0.50 or 1/2 = 10/20


Average velocity (related to molecular speed) → inversely proportional to square root of molar mass: 


molecular speed = 3RTMM


ave. velocity Arave. velocity He=139.9514.003=~ 0.33 or 1/3 (one third)

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Problem Details

A box contains equal amounts of helium, argon, and krypton (all gases) at 25 C. Describe the temperatures, masses, average velocities, and average kinetic energy of the three kinds of gas in the mixture. What do they have in common? What are the differences? How are these properties related? 

Match the words in the left column to the appropriate blanks in the sentences on the right .


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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 Molecular Theory concept. You can view video lessons to learn Kinetic Molecular Theory. Or if you need more Kinetic Molecular Theory practice, you can also practice Kinetic Molecular Theory practice problems.

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Based on our data, we think this problem is relevant for Professor Burnes' class at UNCG.