Particle Model Quiz - Set 2

What name is given to a change of state from liquid to solid?

• melting

• freezing

• evaporation

• condensation

What is the unit for mass?

• kilograms (kg)

• newtons (N)

• metres cubed (m³)

• kilograms per metre cubed (kg/m³)

Which of the following is a change of state?

• melting

• freezing

• boiling

• all of the above

Density can best be defined as...?

• the mass of a substance

• how much space a substance takes up

• the mass per unit volume of a substance

• whether an object will float in water or not

Which of the following is the best description of pressure?

• the force exerted by the particles of a gas on a surface

• the force exerted by the walls of a container on the particles of a gas

• the mass of an object per unit volume

• the force exerted on an object due to gravity

The temperature of a gas is increased while its volume is kept constant. How does this affect the pressure exerted by the gas?

• the pressure increases

• the pressure decreases

• there is no change

• it depends on the type of gas

How much energy is required to increase the temperature of 1kg of water from 20°C to 50°C? The specific heat capacity of water is 4200J/kg °C. Use the equation change in thermal energy = mass × specific heat capacity × temperature change.

• 126J

• 126 000J

• 140J

• 4170J

Which of the following is the temperature of a gas most closely related to?

• the number of particles in the gas

• the size of the container the gas is held in

• the average kinetic energy of the particles

• the size of the particles in the gas

An object has a mass of 100kg and a volume of 5m³. What is the density of the object?

• 20kg/m³

• 10kg/m³

• 500kg/m³

• 50kg/m³

800J of energy is required to change the state of 20kg of a substance from solid to liquid. What is the specific latent heat of fusion of the substance? Use the equation change in thermal energy = mass × specific latent heat.

• 1600J/kg

• 400J/kg

• 40J/kg

• 16 000J/kg