Solids, liquids and gases

Relationship between density, mass and volume

Density = mass/volume

How to measure volume of irregular object

Measure water displaced in measuring cylinder/from spout of eureka can

Relationship between pressure, force and area

p = F/A

Pressure at a point in a gas or liquid at rest

Acts equally in all directions

If i have a cube submerged in water describe the forces acting upon it

Fluid exerts pressure evenly across surface of object from all directions acting perpendicular to surface

Relationship for pressure difference in liquid

P = height x density x grav field strength

Describe forces on walls of container filled with gas

Molecules in gas have random motion so exert a force when colliding with wall (creates pressure on walls)

What is absolute 0

0 kelvin / -273 degrees C / temperature at which KE is minimum

3 degrees C = how many K?

276K

How does increase in temperature affect gas molecules

Increase in average speed as they gain KE and KE = ½ mv²

What is temperature of kelvin in a gas proportional to

Average ke of molecules

Relationship between kinetic energy and kelvin temp of a gas

Temp in K of gas is proportional to Ek of molecules

Relationship between pressure and volume at a constant temperature

Pressure up when volume down

Why pressure up when volume down (same temp)

Pressure = force / area, area at which collisions occur has decreased

Relationship between pressure and kelvin temperature at constant volume

Pressure up when temp up; P1/T1 = P2/T2

Why pressure up when temp up (same volume)

higher Ek = higher force + frequency of collisions over same area; p = f/a so pressure inc

Relationship between volume and temperature of a gas (constant pressure)

Higher temp = greater force on walls; area must increase in proportion to force for constant p

What do you NEED to remember for pressure and kelvin temperature of gas at constant volume ?!

P1/t1 =p2/t2 ; CONVERT TEMP TO KELVIN FIRST

Relationship between pressure and volume of fixed mass of gas at constant temperature

P1V1 = P2V2

Conditions for using p1v1 or p1/t1 equations

Must be fixed mass of gas