Chemistry - Principles of Chemistry - States of matter
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/16
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai |
|---|
No analytics yet
Send a link to your students to track their progress
17 Terms
What are the three states of matter?
Solids, Liquids and gases
A substance can usually exist in all three states, dependent on temperature (and pressure)
True
State changes occur at the _______ point and the _______ point.
melting, boiling
_______ and ________ occurs at the melting point
Melting and freezing
_______ and __________ takes place at the boiling point
Boiling and condensing
Properties of solids
Particles are arranged in a regular, fixed pattern.
Particles vibrate about fixed positions but do not move from place to place.
Particles are very close together, so solids have a fixed shape and volume.
Properties of liquids
Particles are randomly arranged but still close together.
Particles can move around each other, allowing liquids to flow.
Liquids have a fixed volume but take the shape of their container.
Properties of gases
Particles are randomly arranged and far apart.
Particles move quickly in all directions.
Gases have no fixed shape or volume and can be compressed.
The amount of energy needed to change state from solid to liquid and from liquid to gas depends on the strength of the forces between the particles
True
The stronger the forces between the particles, the _____ ______ that is needed to overcome them
more energy
The stronger the forces between the particles the higher the _______ _____and _______ _____ of the substance
melting point, boiling point
Changing states is a ________ change
Physical
What happens in a physical change such as boiling or melting? (refer to the particles)
The particles themselves remain the same, it is just the forces between the particles which change
Melting is when a _____ changes into a ______.
solid, liquid
Melting happens at a specific temperature, known as the _______.
melting point
How does melting occur
Heat / thermal energy absorbed by the particles is transformed into kinetic energy
This causes the particles to vibrate more and start to move / flow