5. Solids, Liquids, And Gases

Question 0

What is the relationship between the pressure and kelvin temperature of a fixed mass of gas at constant volume?

Answer 0

The higher the Kelvin the higher the pressure.

If volume and mass are kept the same, then increasing one will increase the other in direct proportion.

p1/t1=p2/t2

Question 1

What is the reaction between the pressure and volume of a fixed gas at constant temperature?

Answer 1

p1V1 = p2V2

Question 2

Describe the qualitative relationship between pressure and kelvin temperature for a gas in a sealed container

Answer 2

As Kelvin increase, energy increases. As the energy of something increases, its particles will move faster and with more force. This will mean more force is exerted over a fixed area- increasing pressure.

So if a gas has its kelvin increased, it will exert more force on the container its in, meaning the pressure will go up.

Question 3

molecules in a gas have a random motion and that they exert a force and hence a pressure on the walls of the container.

(Turn over for more info)

Answer 3

Molecules of gas move randomly about space. When the collide with a surface, they exert pressure on it. For example air particles collide with the surface of a balloon, the pressure the exert keeps the balloon inflated.

Question 4

What is Brownian motion?

What is the particle theory?

Answer 4

Brownian motion is the principle that particles move randomly about a space.

Particle theory says that as particles move about (randomly) they collide, when they collide with a surface the exert a pressure on the surface (like air keeping a balloon inflated.)

Question 5

What equation links pressure difference, height, density, and gravity?

Answer 5

Pressure difference= height x density x gravity

Question 6

What equation links pressure, force, and area?

Answer 6

Pressure = force / area

Question 7

describe experiments to determine density using direct measurements of mass and volume

Answer 7

Using a set mass of one object (eg 100ml of water) change the space its in (eg 200ml cylinder taking ten off the ml each time.) Use the formula mass/volume to find the density, it will go up as the volume decreases.

Question 8

What equation links density, mass, and volume?

Answer 8

Density = mass / volume