What properties distinguish solids from liquids? Liquids from gases? Solids from gases?
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Chemistry 2e · 1.2 Phases and Classification of Matter
Phases and Classification of Matter: practice problems
9 problems from the book, with its answers. Check your working, or have any of them explained to you on the whiteboard.
Exercises 11
How does a homogeneous mixture differ from a pure substance? How are they similar?
Exercises 13
How do molecules of elements and molecules of compounds differ? In what ways are they similar?
Exercises 15
Exercises 17
Exercises 19
Exercises 21
Exercises 23
Exercises 25
Key terms · 17
- atom
- smallest particle of an element that can enter into a chemical combination
- compound
- pure substance that can be decomposed into two or more elements
- element
- substance that is composed of a single type of atom; a substance that cannot be decomposed by a chemical change
- gas
- state in which matter has neither definite volume nor shape
- heterogeneous mixture
- combination of substances with a composition that varies from point to point
- homogeneous mixture
- (also, solution) combination of substances with a composition that is uniform throughout
- liquid
- state of matter that has a definite volume but indefinite shape
- law of conservation of matter
- when matter converts from one type to another or changes form, there is no detectable change in the total amount of matter present
- mass
- fundamental property indicating amount of matter
- matter
- anything that occupies space and has mass
- mixture
- matter that can be separated into its components by physical means
- molecule
- bonded collection of two or more atoms of the same or different elements
- plasma
- gaseous state of matter containing a large number of electrically charged atoms and/or molecules
- pure substance
- homogeneous substance that has a constant composition
- solid
- state of matter that is rigid, has a definite shape, and has a fairly constant volume
- solution (also, homogeneous mixture)
- combination of substances with a composition that is uniform throughout
- weight
- force that gravity exerts on an object
Learn 1.2 on the whiteboard
The tutor teaches the whole section, drawing it out step by step and answering your questions as you go.