chemical & physical properties
DESCRIPTION
Chemical & Physical Properties. Physical Properties. Properties that are unique for each substance and are used to identify the substance itself. Physical stateColorOdorTexture ClarityLusterFormHardness BrittlenessMalleabilityDuctilityViscosity - PowerPoint PPT PresentationTRANSCRIPT
Physical Properties
Properties that are unique for each substance and are used to identify the substance itself
Physical state Color Odor Texture
Clarity Luster Form Hardness
Brittleness Malleability Ductility Viscosity
Melting point Boiling point Density
Chemical Property
Properties of a substance that we observe when it reacts or does not react with other substances
Ability to react with oxygen
iron rust in moist air; gold doesn’t
Ability to burn
hydrogen burns in oxygen but nitrogen doesn’t
Ability to react with acid
Zinc reacts with acid; but glass doesn’t
Physical Change
No new substance is produced
Substances remains the same even with a change of state
May involve the addition of energy or release of energy
Outside may look different, Particles may be rearranged but the substance is still the same.
Physical Change - Examples
Mixing sugar and water
Ice melting into water
Solid wax to liquid wax
Changing shape
Chemical Change
Final substance is substantially different than initial substance
New substance is always produced
Energy is usually released but may be required to get the change going
Signs of a Chemical Change
Forming of Gas
Forming of a solid (precipitate)
Release or absorption of energy
Color change