Which moves faster

Exercise and reference answers

Questions

1. A

   Average speed of a light molecule

   B

   Average speed of a heavy molecule

   Higher value

   Average speed of a light molecule

2. A

   rms speed at 300 K

   B

   rms speed at 600 K

   Higher value

   rms speed at 600 K

3. A

   Average kinetic energy of O2 at 300 K

   B

   Average kinetic energy of H2 at 300 K

   Higher value

   Average kinetic energy of H2 at 300 K

4. A

   Mean free path in a gas

   B

   Mean free path in a liquid

   Higher value

   Mean free path in a gas

Instructions

Tap the side you think is higher.

Explanation