Question

A 1.94 mol sample of O2 gas is confined in a 45.2 liter container at 10.8 °C. If the volume of the gas sample is increased to 90.4 L, holding the temperature constant, the pressure will decrease. Which of the following kinetic theory ideas apply?

1. For a given gas at constant temperature, the force per collision is constant. Some other factor must cause the pressure decrease.

2. At higher volumes molecules have lower average speeds.

3. With lower average speeds, on average the molecules hit the walls of the container with less force.

4. With a larger volume to move in, the molecules hit the walls of the container less often.

5. None of the Above

Answer 1