Phase Changes and Diagrams in Chemistry

Phase Changes and Diagrams in Chemistry

Assessment

Interactive Video

Chemistry, Science, Physics

9th - 12th Grade

Hard

Created by

Patricia Brown

FREE Resource

This video tutorial introduces phase diagrams, explaining how they track temperature and pressure changes alongside the phase of matter. It discusses the concept of the triple point, where a substance can exist in all three phases simultaneously. The tutorial emphasizes the importance of understanding phase changes through graph interpretation, particularly in high school chemistry, where students learn to identify phases at specific temperatures and pressures without complex calculations.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the two main factors that can change the phase of matter?

Volume and density

Temperature and pressure

Density and temperature

Mass and volume

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does a data point on a line in a phase diagram indicate?

A phase change

A decrease in pressure

A stable phase

An increase in temperature

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the triple point in a phase diagram?

Where a substance is only a solid

Where a substance is only a liquid

Where a substance is only a gas

Where a substance can exist in all three phases

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it challenging to achieve the triple point in a lab setting?

It requires a large sample size

It requires high temperature

It requires low pressure

It requires precise control of both temperature and pressure

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

At high pressure and low temperature, what phase is a substance likely to be in?

Solid

Liquid

Gas

Plasma

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to a liquid when the pressure is decreased?

It freezes

It solidifies

It vaporizes

It condenses

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does a gas behave when the pressure is increased?

It becomes a solid

It vaporizes

It remains a gas

It condenses to a liquid

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