MATTER II. Describing Matter Physical Property Physical Change Chemical Change Chemical Property

Physical Property A characteristic of a substance that can be observed without changing its identity. can be used to separate mixtures EX: magnetism, density

Physical Change A change in the form of a substance without changing its identity. properties remain the same reversible can be used to separate mixtures EX: dissolving, grinding

Chemical Change A change in the identity of a substance. properties change irreversible Signs: color change, formation of a gas/solid, release of light/heat EX: burning, rusting

Chemical Property A characteristic that indicates whether a substance can undergo a specific chemical change. EX: flammability, reactivity

Extensive vs. Intensive Extensive Property depends on the amount of matter present Intensive Property depends on the identity of substance, not the amount C. Johannesson

Extensive vs. Intensive Examples: boiling point volume mass density conductivity intensive extensive C. Johannesson

Physical vs. Chemical C. Johannesson Physical Property can be observed without changing the identity of the substance Chemical Property describes the ability of a substance to undergo changes in identity C. Johannesson

Physical vs. Chemical C. Johannesson Examples: melting point flammable density magnetic tarnishes in air physical chemical C. Johannesson

Physical vs. Chemical C. Johannesson Physical Change changes the form of a substance without changing its identity properties remain the same Chemical Change changes the identity of a substance products have different properties C. Johannesson

Physical vs. Chemical C. Johannesson Signs of a Chemical Change change in color or odor formation of a gas formation of a precipitate (solid) change in light or heat C. Johannesson

Physical vs. Chemical C. Johannesson Examples: rusting iron dissolving in water burning a log melting ice grinding spices chemical physical C. Johannesson