Physics Unit 3 - Particle Model Quiz

Which state has particles in this formation?

• Solid

• Liquid

• Gas

What change of state turns a gas into a liquid?

• Freezing

• Melting

• Evaporation

• Condensation

When dry ice is used, it changes state from solid straight to gas. What is this called?

• Evaporation

• Liquidation

• Plasmafication

• Sublimation

Heating water is a _____________ change.

• Physical

• Chemical

Burning toast is a __________________ change.

• Physical

• Chemical

What is happening when the line is horizontal on a heating curve (B or D)?

• Heating up

• Changing state

• Cooling down

• Nothing

Why is it horizontal?

• Energy is needed to break bonds not increase temperature.

• No energy is going into it at that point.

• The temperature is increasing all the time.

• We have paused the experiment for a second.

Stearic acid is cooled from liquid to solid. Why is the graph curved?

• It is losing mass.

• It is gaining mass.

• Hotter objects lose energy faster.

• Colder objects lose energy faster.

When will the temperature stop decreasing?

• 0^oC

• 40^oC

• 100^oC

• Room temperature

What is specific heat capacity?

• Energy required to break bonds.

• Energy required to raise 1kg of a substance by 1^oC.

• Energy required to change the state of a substance.

• Energy required to melt a substance.