Particle Model & Forces and Matter

"The forces between the particles are not strong enough to hold them in fixed positions. The particles can move past each other. The particles are still very close together." Which state of matter is being described here?

• Solid

• Liquid

• Gas

Which of the following statements describe the particles in a solid. Tick all that apply.

• Very close together

• Not moving

• Arranged in a regular pattern

• Can move past each other

Which of the following are properties of a gas? Tick all that apply.

• Takes the shape of its container

• Can be compressed

• Can flow

• Fills its container

What are the units of density?

• kg/cm³

• kgcm³

• kgm³

• kg/m³

A large piece of wood is 2 m long, 50 cm wide and 2 cm thick. It has a mass of 12 kg. What is its density in kg/m³ ?

The following is a list of steps for finding an object's density. What is the correct order of the steps?

A. Fill the displacement can with water until it just comes out of the spout

B. Read the volume of the displaced water

C. Find the mass of the object

D. Hold a measuring cylinder under the spout and carefully lower the object into the can

• B D C A

• A D B C

• C A D B

• C A B D

What name is given to the process whereby a gas changes into a liquid?

• Evaporation

• Condensation

• Sublimation

• Deposition

What name is given to the process whereby a solid turns into a gas?

• Evaporation

• Condensation

• Sublimation

• Deposition

A student heats 150 g of wax at a constant rate.

The heater supplies 1600 J/minute.

The diagram shows how the temperature of the wax changes with time as it is heated at a constant rate.

What is happening to the wax between 5 mins and 25 mins?

• Solidifying

• Getting hotter

• Evaporating

• Melting

A student heats 150 g of wax at a constant rate.

The heater supplies 1600 J/minute.

The diagram shows how the temperature of the wax changes with time as it is heated at a constant rate.

Calculate the specific latent heat of fusion of paraffin wax using the equation:

thermal energy (Q) = mass (m) × specific latent heat (L)

• 213,333 J/kg

• 10,667 J/kg

• 213 J/kg

• 320,000 J/kg