Phase Changes and Atomic Movement

Phase Changes and Atomic Movement

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial covers identifying true statements about the movement of molecules in solids and liquids, understanding the phase diagram of carbon dioxide, and the conditions under which it becomes a supercritical fluid. It explains phase transitions such as sublimation, melting, and boiling. Finally, it demonstrates how to determine the formula of a compound based on its lattice structure, focusing on face-centered cubic lattices and tetrahedral holes.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement about the movement of atoms in solids is correct?

Atoms in solids are relatively stationary.

Atoms in solids have no movement at all.

Atoms in solids move rapidly.

Atoms in solids move freely.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the molecules of a liquid when it is heated?

They remain unchanged.

They slow down.

They stop moving.

They speed up.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the triple point in a phase diagram?

The point where only the solid phase exists.

The point where solid, liquid, and vapor phases coexist.

The point where only the liquid phase exists.

The point where only the vapor phase exists.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

At what conditions does carbon dioxide become a supercritical fluid?

Below 73 atmospheres and 304.25 K

Above 73 atmospheres and 304.25 K

Below 73 atmospheres and above 304.25 K

At exactly 73 atmospheres and 304.25 K

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the transition from solid to gas called?

Boiling

Sublimation

Melting

Condensation

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the transition from solid to liquid known as?

Melting

Sublimation

Freezing

Boiling

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the transition from liquid to gas called?

Freezing

Sublimation

Boiling

Melting

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