Density and factors that affect gas pressure

Cards (12)

Density - how much mass a substance has, per unit of volume
Gas in a closed container means the particles will be able to move around in random directions
When hitting a wall the particles rebound
Total pressure depends on 2 things: how many collisions, how much energy each collision involves.
Density equation
$density =$ $mass/volume$
There are three things that affect this, they are temperature, concentration, and volume
Temperature - heating the gas means the thermal energy will be transferred into the kinetic energy stores. The particles when move around more, causing more collisions with the container wall
Pressure increases as temperature increases
Concentration - increasing the number of particles means there are more collisions
Pressure increases as concentration increases
Volume - making a container smaller means there are more particles per unit volume, so the pressure increases. Less space means more collisions with a wall.
As volume decreases, pressure increases