CHEM 1211K 1st Edition Lecture 1 Outline of Last Lecture I No Previous Lecture Chapter 1 Matter Measurement and Problem Solving II 1 1 Atoms and Molecules III 1 3 The Classification of Matter A Matter Occupies space and has Mass It has 3 states B Solids retains fixed volume and shape not easily compressible and it does not flow easily C Liquid assumes the shape of the part occupied not easily compressible and it flows easily D Gas assumes shape and volume of container it s compressible and it flows easily Matter Pure Substance Elementary Substance Ex Helium Mixture Compound Heterogeneous Homogeneous Ex Pure Water Ex Wet Sand Ex Tea w sugar A compound is composed of 2 or more types of elements atoms IV 1 4 Physical and Chemical Changes and Physical and Chemical Properties A Physical Changes changes in state appearance but not composition B Chemical Changes changes in composition These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute C Common Physical Changes Dissolving state changes boiling condensing melting freezing and subliming D Common Chemical Changes Rusting burning and dyes fading or changing colors V 1 6 Units of Measurement A SI Units set of international standard units for comparing all our measurements B Meter m is the SI Unit for measuring length 1 yard 36 inches 1 meter 39 37 inches C Kilogram kg is the SI unit of measuring mass Mass of an object measures the quantity of matter within it Each atom has its own mass Weight of an object is a measure of gravitational pull on the matter within it D Kelvin K is the SI unit for temperature C F 32 1 8 K C 273 15 E A derived unit is a combination of other units Volume is the measure of space Length x Length x Length Volume Always raised to the third power F Density is the ratio of mass to volume is an intensive property Extensive properties are properties whose value depends on the quantity of matter Mass volume are examples of an extensive property Intensive properties are properties whose value is independent of the quantity of matter Chapter 1 Matter Measurement and Problem Solving