(Chemistry) Physical and Chemical properties Flashcards
PHYSICAL CHANGE
The type of change that produces NO NEW SUBSTANCE
A change in shape or size, state, and formation of a solution are:
Physical Changes.
CHEMICAL CHANGE:
The type of change that produces NEW SUBSTANCE.
This type of change is a chemical reaction.
What are five general things that indicate a chemical change?
Odour - New Odour
Colour - Change in Colour
Gas - Gas is produced
Energy - Change in energy
Precipitate (solid) formation
___ are difficult to reverse, where as __ are easier to reverse (with some exceptions).
Chemical changes
Physical changes
PHYSICAL PROPERTIES:
A characteristic of a substance that can be determined WITHOUT CHANGING THE COMPOSITION OF THE SUBSTANCE
CHEMICAL PROPERTIES:
a characteristic of a substance that is determined when the COMPOSITION OF THE SUBSTANCE IS CHANGED AND NEW SUBSTANCE(S) ARE PRODUCED.
Flammability
Chemical change
The ability of a substance to burn
Ex) Gasoline is flammable
Reactivity
Chemical change
The ability of a substance to combine and form new substances
Ex) Many metals are moderately reactive - since they easily rus
Toxicity
Chemical change
The ability of a substance to be poisonous
Ex) Arsenic is toxic
Radioactivity
Chemical change
The ability of a substance to give off radiation
Ex) Uranium
Sensitivity to Light
Chemical change
How sensitive a substance is when under light or the sun
Ex) Many medications are light sensitive and should be store in a dark place - Polysporin Pink Eye Drops
Colour
Physical change
The colour of a substance
State
Physical change
The state of matter
(ex. the floor tiles are solid)
Lustre
Physical change
How bright, shiny, or dull something is
Optical Clarity
Physical change
The ability of light to pass through an object (how opaque it is)
Brittleness
Physical change
The breakability/flexibility of something
Viscosity
Physical change
The ease with which a substance can flow
Hardness
Physical change
The relative ability of a substance to scratch (or be scratched by) another substance
Ex) Diamond is a very hard substance because it can easily scratch softer substances like aluminum or gol
Malleability
Physical change
The ability of a substance to be formed or hammered into a sheet
Ex) Steel is a popular metal alloy because of its malleabilit
Ductility Conductivity
Physical change
The ability of a substance to be formed or pulled into wires.
Ex) Copper is a popular metal among electricians because of its ductility.
Electrical
Physical change
How easily electricity can flow through a substance
Ex) Copper is also popular for electricians because it is a good conductor of electricit
