P3 matter

Question 1

What happens when you pump more air into a tire

Answer 1

There would be more gas particles present in the same volume therefore there would be more collisions with the tire and each other hence the pressure would increase

Question 2

What happens to pressure of gas when the temperature is increased

Answer 2

When the temperature increases it increases the kinetic energy of the particles. Therefore the particles would move around more and there would be more frequent collisions with more momentum so when a particle collides with a solid there would be more force exerted per unit area. Because of this the pressure increases

Question 3

How does the area of a surface affect the pressure exerted on it

Answer 3

The larger the surface area the higher the total force acting on it as there are more particles that are exposed to it therefore there is more pressure exerted on the surface.

Question 4

What is the formula for density

Answer 4

Density = mass/volume

Question 5

Describe an experiment that can be carried out to measure the density of a liquid

Answer 5

First place a beaker on a scale and switch it on.
Then pour liquid into it and measure the weight of the liquid.
Then pour the liquid into a measuring cylinder and measure the volume of the liquid.
Then do the density formula to figure out the density of the liquid

Question 6

Describe A method that can be used to calculate the density of an irregular shape

Answer 6

Use a eureka can Filled with water and please a measuring cylinder next to the spout of the eureka can.
Then measure the weight of the irregular shape using a scale.
And then placed the shape into the eureka can and measure the volume of water displaced by the shape.
Then do the density formula to find the density

Question 7

During the change of state what Remains constant

Answer 7

The mass temperature

Question 8

What is sublimation

Answer 8

When a solid changes state to a gas

Question 9

What is meant by the term physical change

Answer 9

A reversible change which leaves you with the same substance but in a different form

Question 10

What is meant by the term internal energy

Answer 10

The energy any particles kinetic and potential energy stores

Question 11

If a student has 30 g of water and boils it and is left with 20 g of water what is the mass of the water that evaporated

Answer 11

10

Question 12

What is specific latent heat

Answer 12

Energy required to change the state of 1 kg of a substance without changing the temperature

Question 13

In terms of particles why does a substance not increase temperature when it is changing state

Answer 13

Because the internal energy is increasing so more energy is used to break the intermolecular bonds between the particles therefore there is no increase in the temperature

Question 14

Which requires more energy specific latent heat of vaporisation or specific latent fusion

Answer 14

Specific latent heat of vaporisation

Question 15

What is pressure

Answer 15

The force per unit area

Question 16

How do you calculate the rate of production

Answer 16

Mass divided by the time

Question 17

If A material with holes is dropped in a European what happens to its volume

Answer 17

The amount of water displaced by the material is larger than its actual volume as it has holes that trap air

Question 18

A and b are same substance. If a is half the mass of b what would happen to the energy required and time taken and boiling point

Answer 18

A. Is half the mass of b. Therefore it requires half the energy to raise the temperature and half the time however they will have the same boiling point as they are the same material

Question 19

What is the formula for specific latent heat

Answer 19

E=mL