Gas pressure and temperature
If the The volume of a three-dimensional shape is a measure of the amount of space or capacity it occupies, eg an average can of fizzy drink has a volume of 330 ml. of a container with a gas inside stays the same, the pressure of a gas increases as its A measure of the average kinetic energy of particles in a substance. increases.
As a result, the gas particles will be travelling faster and will collide with the walls of the container more frequently, and with more A push or a pull. The unit of force is the newton (N)..
This means that there is a A relationship tells us how two or more variables work together, eg the relationship between resistance, voltage and current is: resistance = voltage Ă· current. between Force exerted over an area. The greater the pressure, the greater the force exerted over the same area. and temperature. If a pressure gauge is connected to a flask of air and the flask is heated, a graph of pressure against temperature can be produced.
As the temperature increases, the pressure increases showing that pressure is directly When two quantities have the same ratio or relative size. For example, current is proportional to voltage if the current doubles when the voltage is doubled. to temperature.