Gas Properties and Laws Flashcards
What are the three properties that affect gas?
Pressure, Temperature and Volume.
What is pressure?
Pressure is the force exerted by one substance on another substance.
How do you calculate pressure?
Pressure = force/area or P = F/A (Pa or Nm-2)
How does temperature affect gases?
As the temperature increases, the kinetic energy of the gas particles increases.
How do you calculate the KE?
KE = 1/2mv^2
How does volume affect gases?
Gas will occupy all of the space in a container so the volume of a container is the same as the volume of gas inside.
What is fixed volume or rigid wall systems?
Fixed volume is when it is constant and does not change.
E.g. solid container.
What is a variable volume systems?
Variable wall systems have walls that can change depending on the volume of gas inside.
What is the relationship between temperature and pressure?
It is proportional.
What is the formula for temp and pressure (gay-lussac’s law)?
P1/T1 = P2/T2
What is the relationship between temperature and volume and why?
It is proportional.
Increase temp –> increased energy of particles –> more collisions with walls –> expanded walls.
What is the formula for temp and volume (charles’ law)
V1/T1 = V2/T2
What is the relationship between pressure and temperature?
Inversely proportional.
What is the formula for pressure and volume (boyle’s law)?
P1V1 = P2V2
