Exam Questions on States of matter

Question 1

Describe the arrangement and movement of the particles in a solid

Answer 1

Regular.

Question 2

What is the change from a solid to a liquid called?

Answer 2

Melting

Question 3

What is the change from a liquid to a gas called?

Answer 3

Evaporation.

Question 4

Density=…

Answer 4

Mass(Kg) x Volume(m³)

Question 5

Describe how to measure the Density of a toy soldier.

Answer 5

1. Fill the Eureka can with water
2. Weigh the toy soldier
3. Place the Measuring cylinder under the eureka can
4. Put the soldier in the eureka can and wait for all the water to drain out.
5. Measure the water in the measuring cylinder

Question 6

What is the name given to the specific latent heat of a substance when it’s changing between a solid and a liquid?

Answer 6

specific latent heat of fusion

Question 7

What is specific latent heat of fusion?

Answer 7

It is the energy needed by the particles to break free from each other.
If the substance in its liquid state is cooled, it will solidify at the same temperature as its melting point. When this happens, the particles bond together into a rigid structure. Latent heat is transferred to the surroundings as the substance solidifies and the particles form stronger bonds.

THE SPECIFIC LATENT HEAT OF FUSION OF A SUBSTANCE IS THE ENERGY NEEDED TO CHANGE THE STATE OF 1KG OF THE SUBSTANCE FROM SOLID TO LIQUID AT ITS MELTING POINT (WITHOUT CHANGING ITS TEMPERATURE)

Question 8

The unit of specific latent heat of fusion is …

Answer 8

joule per kilogram (J/kg)

Question 9

Latent Heat is…

Answer 9

The energy transferred when a substance changes it’s state.

Question 10

Specific latent heat…

Answer 10

The energy transferred per kilogram when a substance changes it’s state.