States of Matter & Phase Changes Quiz

What is the process called when a solid turns into a liquid?

• Condensation

• Sublimation

• Melting

• Freezing

At what point do all three states of matter (solid, liquid, gas) coexist at equilibrium?

• Boiling point

• Melting point

• Triple point

• Critical point

What will happen to a pot of water if enough pressure is exerted upon it?

• It will boil

• It will freeze

• It will turn to a solid

• It will turn to a gas

When the temperature of solid CO2 is increased, which of the following occurs?

• Vaporization

• Condensation

• Sublimation

• Melting

What is the melting point of a substance?

• The temperature at which a liquid turns into a gas

• The temperature at which a liquid can turn to a solid

• The temperature at which a gas turns into a liquid

• The temperature at which a liquid turns into a solid

Which of the following is true about a change in pressure placed upon a substance?

• Increasing pressure causes particles to move closer together

• Increasing pressure raises the melting point

• Decreasing pressure causes particles to move closer together

• Decreasing pressure rases the boiling point

What is the term for the change from gas to liquid?

• Freezing

• Melting

• Condensation

• Sublimation

Which of the following best describes the triple point of a substance?

• The temperature and pressure at which a substance can exist as a solid, liquid, and gas simultaneously

• The highest temperature at which a substance can exist as a liquid

• The lowest pressure needed to turn a solid into a gas

• The point at which a substance changes from a solid to a liquid

Water vapor will turn to liquid water when it reaches the ________.

• boiling point

• melting point

• maximum internal pressure

• maximum temperature

What effect does decreasing the temperature have on the internal pressure of a gas in a closed container?

• Pressure increases

• Pressure decreases

• Pressure remains the same

• Pressure first decreases, then increases