Topic: Matter Do Now: Lesson 1 in the book

Matter mass space Anything that has mass and occupies space –Massgrams kilograms –Mass is measured in grams or kilograms volume literscm 3 –Space or volume is measured in liters or cm 3

Phases

Solid: Solid: definite volume definite shape

Liquid definite volume indefinite shape takes the shape of container

Gas indefinite volume indefinite shape takes the shape and volume of container

Properties – used to characterize matter Physical –how they look Chemical – how they react with others

Physical Properties Describe the appearance and form of matter Words: color, texture, luster, odor, solid, liquid, gasMeasurements: a number and a unit

Chemical Properties Describe how matter behaves in presence of other matter Describe how matter changes into another kind of matter –Flammable –Corrosive –Ability to neutralize acids or bases

Physical or Chemical? Reddish brown Forms new substances with HNO 3 MP = 1085  C Density = 8.92 g/cm 3 Reacts to form green copper carbonate Shiny Malleable BP = 2570  C - physical - chemical

Matter goes through changes

Changes Physical – identity remains the same Chemical – identity of matter changes

Physical Change identityThe form or appearance of sample may change but identity remains same –Cutting, crushing, grinding,tearing –Phase changes –Dissolving

Dissolving is physical change Think of sugar in water still have sugar – you just spread it out with water molecules in between C 6 H 12 O 6 (s)  C 6 H 12 O 6 (aq) Aq = dissolved in water

Phase changes are physical changes No new substance is created (chemical formula stays the same) Ex: ice melting: H 2 O(s)  H 2 O(l) water boiling: H 2 O (l)  H 2 O(g)

Chemical Change chemical change - identity of matter is changed new substance with unique properties is formed Example - burning The chemical formula changes Ex: 2H 2 O(l)  2H 2 (g) + O 2 (g)

Evidence of Chemical a Chemical Change Bubbles (formation of a gas) Color change Heat Light Formation of a precipitate (new substance)