Ch 3 Flashcards
How is the state of matter determined
By the strength of the force holding it together
How strong are the forces holding together each state of matter
Solid-strong
Liquid- Intermediate
Gas-weak
Properties of solids
Definite shape and volume
Highly organized particles
Constantly vibrating
Properties of liquids
Definite volume, indefinite shape.
Particles free to slide past one another
Molecules expand when heated
Properties of gases
Indefinite shape and volume
Molecules are not touching/connected
Exerts a pressure on its surroundings
Aqueous Solutions
Homogeneous mixtures. One or more substances dissolved in water.
Physical property
Can be measured without changing the identity/composition
(Color, odor, BP)
Chemical properties
Ability to form new substances
Corrosion, Reactivity, flammability
Physical Change
Changes not affecting the composition
(State changes)
Chemical change
What you start with is not what you end up with
Not reversible
What are the 2 kinds of substance/pure matter
Element- Simplest form of matter
Compound- 2+ different elements that combine chemically
What makes something a mixture
What are the two types
Can be separated by physical means
Homogeneous
heterogeneous
Homogeneous mixture
Uniform solution 1 phase of matter
Heterogeneous
Not uniform in composition, a sample taken wouldn’t have equal parts of each component.
Distillation
Does composition change?
Separating mixtures based on BOILING POINT.
Does not change the composition of each substance
