Do Now: Look back at your description of aluminum foil (or describe it now), were the characteristics you listed physical or chemical properties? Why? Write the mathematical model for the conversion of 300.4 dkL to L (or mL if you’re up for a challenge)!

B. Physical vs. Chemical 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

Properties of Matter Physical properties are the characteristics of matter that can be changed without changing its composition. characteristics that are directly observable Chemical properties are the characteristics that determine how the composition of matter changes as a result of contact with other matter or the influence of energy. characteristics that describe the behavior of matter 58 58

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

Matter Classification C. Johannesson

Exit Card: Answer the following alone: What are the four states of matter? Which state has the fastest moving particles? Which two states do not have a definite volume? List one chemical and one physical change. Is weight an extensive or intensive property? Is density a chemical or physical property? Which class(es) of matter can be separated by physical means (with a filter, distillation, or by hand)? 65 65