Classification, Properties And Changes....
-
Upload
patience-atkinson -
Category
Documents
-
view
212 -
download
0
Transcript of Classification, Properties And Changes....
MatterClassification,
Properties And Changes
Matter
Substances
Elements Compounds
Mixtures
Homogeneous Heterogeneous
Classification of Matter
Substances = fixed ratio; can not be separated using physical properties.
Elements - periodic table Compounds – 2 or more elements
combined Mixtures = variable ratio; can be
separated using physical properties. Homogeneous- same throughout Heterogeneous- distinguishable components
Substances vs Mixtures
Filtering - based on size/un-dissolved solids
Distillation – based on boiling point Chromatography – based on solubility Centrifugation – force on sedimentation Gaseous Diffusion – lighter gases diffuse
faster Magnetic Attraction – magnetic
properties Evaporation – dissolved solids from a
liquid
Separation of Mixtures
Physical Properties - can be observed or measured without changing the identity of the matter
Chemical Properties – the ability of a substance to change into a new substance with different properties
Properties of Matter
Include: color, odor, texture, density, boiling point, freezing point, thermal conductivity,
malleability, ductility, solubility, density.
Intensive one that does not depend on the system size or the amount of material in the system
Extensive one that is directly proportional to the amount of material in the system
Physical Properties
INTENSIVE: EXTENSIVE Temperature Volume Density Mass Viscosity Size Color State of Matter
Intensive vs Extensive Examples
ReactivityFlammabilityOxidation State – loss/gain of electrons
Chemical Properties
Solid – definite shape and volume
Liquid – definite volume
Gas – no definite shape or volume
States or Phases of Matter
Phase Change of Water
Melting – solid to liquid Boiling – liquid to gas Condensing – gas to a liquid Freezing – liquid to solid Sublimation – solid to gas without passing
through liquid phase Deposition – gas to solid without passing through liquid phase
Phase Changes