What happens to gases when the temperature changes?

They expand or contract much more than solids.

What does warming a sample of helium from 0°C to 100°C do to its volume?

Increases its volume by about one third.

According to the particle model, what happens to the particles in gases when they are warmed?

They move faster and spread farther apart.

Why do workers light an oil-soaked rope next to the tracks in extreme cold?

To cause the tracks to expand and reconnect

Why would it be a bad idea to stretch the transmission lines more tightly between the towers in winter?

It would cause too much stress on the lines when they contract in the cold.

What is a characteristic of a solid state of matter?

It has a fixed volume and cannot be compressed.

What is the characteristic of particles in a gas compared to liquids and solids?

They have the most particle movement and the most space between particles.

What happens to the particles of a solid when it is heated?

The particles vibrate more energetically and some move farther away from one another.

What occurs when a solid melts?

The particles bump against one another and some break loose, beginning the process of melting.

What is a characteristic of liquids according to the particle model?

Liquids take on the shape of their containers.

What happens to the particles in a liquid when it boils?

Some of the particles are "kicked out" of the liquid as it changes to a gas.

What is true about gas particles?

Gas particles move about very quickly in all directions and will fill up the space of any container.

According to the particle model, what happens when a gas is heated?

The gas particles spread out even more and the gas expands.

What is depicted in Figure 3.18?

The changes of state in matter, including melting, evaporation, condensation, and sublimation.

What is temperature a measure of according to the Water's Phase Change Graph?

The kinetic energy of the particles

What is heat defined as in the context of the Water's Phase Change Graph?

The amount of energy you put into or out of the particles

During solidification, what happens to energy?

It is released away from the substance

What is an example of sublimation mentioned in the image?

"Dry ice" turning from CO2 solid to gas

What happens to the volume of solids, liquids, and gases during thermal expansion?

They expand and take up more space

What is an example of sublimation?

"Dry ice" or CO2 going from solid to gas

HT.2.a State change (AI from PPTX test) Flashcards

Student preview

47 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What do some changes in states of matter require or release?

Back

Energy

2.

FLASHCARD QUESTION

Front

Which term refers to the increase in size of a material when it is heated?

Back

Thermal expansion

3.

FLASHCARD QUESTION

Front

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

Back

Solidification

4.

FLASHCARD QUESTION

Front

Transition from solid to liquid

Back

Fusion

5.

FLASHCARD QUESTION

Front

What is the process of a gas turning into a liquid called?

Back

Condensation

6.

FLASHCARD QUESTION

Front

What is the term for the direct transition from solid to gas?

Back

Sublimation

7.

FLASHCARD QUESTION

Front

Why do sidewalks have cracks?

Back

To allow for thermal expansion and contraction

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