Exploring Phase Changes and Diagrams

What is the process called when a solid turns directly into a gas?

• Deposition

• Sublimation

• Melting

• Condensation

Which phase change involves a direct transition from gas to solid?

• Melting

• Deposition

• Sublimation

• Boiling

At what point does a liquid's vapor pressure equal atmospheric pressure?

• Boiling point

• Condensation point

• Melting point

• Freezing point

Tags

NGSS.MS-PS1-4

Why does water boil at a lower temperature at higher altitudes?

• Higher atmospheric pressure

• Higher vapor pressure

• Lower vapor pressure

• Lower atmospheric pressure

What is the term for the temperature at which a liquid turns into a crystalline solid?

• Boiling point

• Melting point

• Sublimation point

• Freezing point

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the energy called that is exchanged during melting?

• Heat of fusion

• Hydrogen bond energy

• Heat of vaporization

• Lattice energy

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

During which phase change does the temperature of a substance not rise despite heat being added?

• Neither boiling nor melting

• Boiling

• Melting

• Both boiling and melting

Tags

NGSS.MS-PS1-4

What does a phase diagram show?

• The boiling and freezing points of a substance

• The density of a substance in different phases

• The energy required for phase changes

• The temperature and pressure at which a substance will be in a particular phase

Tags

NGSS.MS-PS1-4

What does the triple point on a phase diagram represent?

• Equilibrium between liquid and gas phases

• Equilibrium between gas and solid phases

• Equilibrium between solid, liquid, and gas phases

• Equilibrium between solid and liquid phases

Tags

NGSS.MS-PS1-4

Why does dry ice typically sublimate at atmospheric pressure?

• Because carbon dioxide is never a liquid at atmospheric pressure

• Because carbon dioxide has a high boiling point

• Because carbon dioxide has a low melting point

• Because carbon dioxide has a high freezing point

Tags

NGSS.MS-PS3-4