A cylinder contains a mixture of helium and argon gas in equilibrium at `150^(@)C`. What is the average kinetic energy for each type of gas molecules?

Options

A. `3.26 xx 10^(-21) J`
B. `8.76 xx 10^(-21) J`
C. `6.28 xx 10^(-21) J`
D. `4.14 xx 10^(-21) J`

Answer

B

Explanation

Both kinds of molecules have the same average kinetic as the temperature is same for both the gas molecules
The average kinetic energy of a molecules , `bar(K) = 3/2 k_(B) T`
`bar(K) = 3/2 (1.38 xx 10^(-23)J//K) (423K) = 8.76xx10^(-21)J`