A 1.35 mol sample of Xe gas is confined in a 33.0 liter container at 24.9 °C. If

Question

A 1.35 mol sample of Xe gas is confined in a 33.0 liter container at 24.9 °C.

If the amount of gas is increased to 2.03 mol, holding the volume and temperature constant, the pressure will increase because:

Choose all that apply.

As the number of molecule-wall collisions increases, the force per collision decreases.

With more molecules per unit volume, the molecules hit the walls of the container more often.

With more molecules in the container, the molecules have higher average speeds.

With higher average speeds, on average the molecules hit the walls of the container with more force

Explanation / Answer

Second statement is True and the rest are false

Wrong: As the number of molecule-wall collisions increases, the force per collision decreases : As the number of molecule-wall collisions increases, the number of molecules hitting the surface increase.

Right: With more molecules per unit volume, the molecules hit the walls of the container more often.

Wrong: With more molecules in the container, the molecules have higher average speeds. (average speed is a function of temperature: Here temperature is kept constant)

Wrong: With higher average speeds, on average the molecules hit the walls of the container with more force (Temerature is kept constant)

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