Consider the following statements: I. For a gas with a spread of molecular speeds, u m p

Question

Consider the following statements:

I. For a gas with a spread of molecular speeds, $u_{m p} < u_{a vg} < u_{r m s}$ .

II. At the same temperature, all ideal gases have the same average kinetic energy per molecule.

III. If only one molecule is present, $u_{m p}, u_{a vg}$ and $u_{r m s}$ are all equal.

IV. At the same temperature, one mole of $H_{2}$ has a greater total kinetic energy than one mole of $O_{2}$ .

Which statements are correct?

TestHub · Accepted Answer

I true (ratio 1 : 1.128 : 1.224).

II Average KE per molecule = (3/2)kT depends only on T: true.

III With one molecule there is a single speed: true.

IV One mole of any ideal gas has KE = (3/2)RT, the same for $H_{2}$ and $O_{2}$ : false.

Correct: I, II and III only. Answer: (C).

Chemistry - Ideal Gas Question with Solution | TestHub