Phase Change Explained

Play an AI-generated podcast conversation about this lesson

What is a phase change?

The process of changing the shape of a substance

The process of a substance gaining or losing energy causing molecules or atoms to come closer or move apart (correct)

The process of a substance changing from a solid to a liquid state

The process of changing the chemical composition of a substance

What happens when a gas loses energy?

It becomes a liquid (correct)

It expands indefinitely

It becomes a solid

It becomes a plasma

Why do liquids take the shape of their containers?

Due to the lack of energy in liquid molecules

Because liquids have a definite shape

Because liquid molecules are highly packed together

Because liquids have more fluidity of movement (correct)

In which phase do atoms and molecules have the least energy?

Solid Signup and view all the answers

What determines the phase a substance will be in, according to the text?

Temperature and pressure Signup and view all the answers

What is the process described when a liquid comes to a boil, expelling molecules at a fast rate, creating vapor through vaporization?

Evaporation Signup and view all the answers

Why do pools constantly need water added even when they are not being used?

Because of simple evaporation of pool water Signup and view all the answers

How does sublimation differ from evaporation?

Sublimation involves a solid skipping the liquid stage and turning into gas directly, while in evaporation, molecules come close to the surface and escape. Signup and view all the answers

What happens when a hot water bottle is brought into a cool house?

The water vapor inside the bottle hits the cooler plastic, losing energy and condensing into droplets Signup and view all the answers

What is the role of intramolecular forces in the process of condensation?

They cause small droplets of water to form by taking over after a loss of energy Signup and view all the answers

What is the critical point on a phase diagram?

Where the boundary between liquid and vapor disappears Signup and view all the answers

Why is plasma of great interest to scientists?

As it is responsible for a large portion of the visible universe Signup and view all the answers

What is the process called when a gas turns directly into a solid, skipping the liquid phase?

Deposition Signup and view all the answers

What happens when a substance skips the liquid phase and turns directly into a gas?

Sublimation Signup and view all the answers

What is the technical term for the process when a gas cools into a liquid?

Condensation Signup and view all the answers

Phase Change Explained

Podcast Beta

Questions and Answers