Physics 9702 · AS & A Level · Density and pressure

Density and pressure — practice question

A quantity of gas trapped inside a cylinder by a piston is warmed gently. Meanwhile, the piston is adjusted so that the pressure stays constant. Because of this, which change will not happen?

  • AThe average velocity of the molecules will increase.
  • BThe mean separation of the molecules will increase.
  • CThe molecules will travel greater distances between collisions.
  • DThe number of collisions per second of the molecules on the piston will increase.

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