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Phase Changes: Melting, Freezing, Vaporization, and Evaporation

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Phase Changes: Melting, Freezing, Vaporization, and Evaporation

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Questions and Answers

What occurs when a substance undergoes a phase change from solid to liquid?

Molecules release heat energy

Molecules stop moving altogether

Molecules speed up and move farther apart (correct)

Molecules slow down and move closer together

What is the temperature at which water boils?

100°C, 212°F, or 373 K (correct)

50°C, 122°F, or 323 K

-273.15°C, -459.67°F, or 0 K

0°C, 32°F, or 273 K

What is the process called when a substance changes from a gas to a liquid?

Condensation (correct)

Vaporization

Evaporation

Melting

What happens to the molecules during the process of vaporization?

They speed up and move farther apart Signup and view all the answers

What is the term for the lowest possible temperature, at which all matter stops moving?

Absolute Zero Signup and view all the answers

What is the process called when a substance changes from a solid to a gas, without going through the liquid phase?

Sublimation Signup and view all the answers

Phase Changes: Melting, Freezing, Vaporization, and Evaporation

Choose a study mode

Podcast

Questions and Answers

What occurs when a substance undergoes a phase change from solid to liquid?

What is the temperature at which water boils?

What is the process called when a substance changes from a gas to a liquid?

What happens to the molecules during the process of vaporization?

What is the term for the lowest possible temperature, at which all matter stops moving?

What is the process called when a substance changes from a solid to a gas, without going through the liquid phase?

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