Pressure, volume and temperature Flashcards
- ideal gas laws - relationships
pressure law
pressure of a fixed mass of any gas with a constant volume is proportional to its absolute temp
P∝T
Charles law
volume of fixed mass of any gas with constant volume is proportional to its absolute temp
V∝T
Boyle’s law
Pressure of a fixed mass of any gas at a constant temp is proportional to its volume
P∝(1/V)
Temp vs pressure
As temperature reduced, gas molecules move slower and each collision with the walls results in a smaller force and overall pressure
Volume vs Temp
As temperature rises, particles move faster and hit the walls more often. Since pressure remains constant, volume must increase so particles move further apart and hit walls at a slower rate
Pressure vs volume
When gas is compressed, particles have less volume to move in, increasing the rate of collision between the walls and particles which causes pressure to increase
Volume change
increase and decrease – effect on density
Increase: density decrease
less particles per unit volume, separation between particles increase
Decrease: density increase
more particles per unit volume, separation between particles decrease
assuming no. of particles constant
Temperature change
increase and decrease – effect on pressure
increases: pressure increases
Average KE of particles increase, rate of collisions of particles and wall of container increase as particles take less time to move across container
decreases: pressure decreases
Average KE of particles decrease, rate of collisions of particles and wall of container decrease as particles take more time to move across container
assuming no. of particles constant
Blank
Bl
