Ideal Gases And Molecules Flashcards
(21 cards)
Volume
Quantity of 3D space occupied by an object
Pressure
Force per unit area
Temperature
Measurement of the average EK of molecules
What equations links pressure force and area
P= F/A
Pressure increases as force increases and area decreases
Molecules in low temperature
Constant mass
Fixed volume
Molecules in high temperature
Increases EK
More collisions with wall of container
Higher force in each collisions
Molecules when volume is lowered
More collisions against wall of container
Force exerted on sides of the container
Pressure increased
Start of Kelvin scale
-273 degrees
Boyle’s Law
For a fixed mass of gas at a constant temperature, pressure is inversely proportional to volume
How to get kelvin from degrees
Add 273
Gas law
P1V1/T1 = P2V2/T2
P1/T1 = P2/T2
Movement of pollen grains in Brownian Motion
Random and rapid
Why do pollen grains move on water
The collide with water molecules
How are water molecules moving
Randomly and rapidly
How would pollen grains move in hotter water
More rapidly
Boyle’s law equation
P1V1 = P2V2
What are the assumptions of Boyle’s law
Fixed mass and temperature when pressure and volume are being dealt with
How does gas exert pressure on a container
The collide with walls
Exert force on walls
This creates pressure
What’s the pressure law equation
P1/T1 = P2/T2
What are the assumptions made for pressure law
Fixed mass and constant volume
Why is -273K called absolute zero
Gases at this temperature do not have any kinetic energy and so aren’t moving and cannot collide so no pressure can build up