Chapter 3 Flashcards
(26 cards)
Vapor
Gaseous state of a substance that is a solid or liquid at room temperature
Substance
Matter of composition
Pure substance
Only one type of substance, not combined with anything
Physical property
Observed characteristic
Chemical property
Ability of substance to combine with another substance (solubility)
Extensive properties
Depend on amount of substance
Intensive properties
Independent, stays the same
Physical change
A substance alters without changing its composition
Phase change
Transition of matter from one state to another
Chemical change
One or more substances changing to a new one
Law of conservation of mass
States of mass are neither created or destroyed during a chemical change
State of matter
Physical forms of something
Mixture
Combination of 2 or more substances
Heterogenous mixture
Mixture that doesn’t blend smoothly and substances remain distinct
Homogenous mixture
Mixture that has a constant composition throughout
Solutions
Homogenous mixtures
Filtration
Technique using barrier to separate solid from liquids
Distillation
Separation technique that heats the substances
Crystallization
Selection technique that forms a solid, pure particles from a solution
Sublimation
Process of solid changes to vapor without melting
Chromatography
Technique that separates parts of mixtures by being drawn to surface. Of another material (usually paper)
Element
Pure substance that can’t be separated
Compound
2 or more elements chemically combined
Law of definite proportions
A compound is always composed of the same elements
