Factors affecting gas pressure

• Gas particles constantly move in a random motion.
• What is the formula for pressure?

  Pressure = force / area
• Factors that increase the pressure of a gas..

  ~ More collisions with the walls of the container

  ~ Faster moving particles
• How volume affects pressure in a gas..

  1 ~ Decreasing the volume of the container, whilst keeping the number of gas particles the same, will increase the concentration.

  2 ~ In this smaller volume, collision between particles and the walls will be more frequent.

  3 ~ A greater number of collisions per unit area of wall means increased pressure.
• How temperature and concentration affect a flexible container..

  1 ~ Some containers, eg balloons, are flexible.

  2 ~ An increase in force on wall would cause container to expand.

  3 ~ Therefore, changing temp or concentration will change volume rather than the pressure.
• ~ Increasing temperature increases pressure ( in a fixed volume container ).

  ~ Increasing concentration increases pressure ( in a fixed volume container ).

  ~ Increasing temperature increases volume ( in a flexible container ).