Period #4 Classification of Matter

Materials : Textbook : Chemistry - Nelson

Graphing hand out

Review : Go Over Lab Report for Investigation 1.2 Separating Matter

Go Over Questions 37-42 on pages 36, 37 and 45 of Nelson

Objectives : students should be able to :

1.15 classify a substance as solid, liquid, or gas, and describe its different properties

1.16 define boiling point, freezing point, and melting point

1.17 describe the simple molecular motions and arrangements for solids, liquids, and gases

1.18 relate the heat changes that occur during phase changes to changes in molecular motions and arrangements

 

Part I - Solids, Liquids, Gases & Cooling / Heating Curves - Notes :

Students hand in Lab on Separating Matter and Chromatography from last day

Give notes on Solids, Liquids and Gases, see notes staring at "SOLIDS, LIQUIDS, AND GASES", page 1-20 of notes.

Experiment 2A - Cooling and Heating Curves of a Pure Substance (Found in Heath on page 15)

• Students read over lab, and answer pre lab question from page 1-21 of notes
• students explain orally what they will be doing in the lab
• handout "Graphing" photocopy and discuss good graphing techniques.
• give procedural hints and discuss safety issues as on page 1-21 of notes
• students must prepare formal lab report (must include all headings)
• Answer ALL questions and Follow up questions

Solids, Liquids and Gases, 1-20

• State - the more energy molecules have, the more they move, this determines their state
• solid -molecules move slowly and are 'stuck' together so that the solid has a shape
• liquid-molecules move faster and can move past each other, gravity determines shape
• gas-molecules have so much energy that they totally escape the liquid and move off on their own
• boiling and melting points depend on the mass and the interactions of the molecules

Exercise :

Lab Report - Heating & Cooling Curve

Part II - Pure Substances - Introduction and Notes

Give Notes on the Law of Definite Composition, see notes starting, "LAW OF DEFINITE COMPOSITION", on page 1-22 of notes.

 

Exercise :

Do 3 problems on page 1-22 of notes.

Evaluation :

Unit One Test