Chem1 CB06 - States of Matter:
Solids, liquids and solutions

The world of solids and liquids that we can see and feel is the first and closest (and initially unconscious) contact that we all have with chemical substances and it is frequently what stimulates young people to develop an interest in Chemistry. The study of bulk matter is an essential preparation for those who work in almost any area of Chemistry, as well as in fields as diverse as food science, physiology, geology and engineering. Perhaps more importantly, it serves as a bridge between everyday experience and the core areas of modern chemical sicience. The lessons in this set attempt to reinforce this connection by making frequent reference to the commonplace, from rocks (extended silicate structures) to boiling (nucleation) to diarrhea (osmosis).

These lessons cover a very broad range ot topics-- considerably more than can be presented in a typical lecture-based course. For this reason the lessons have been organized with flexibility in mind; there are 39 of them (some very short, and some involving problems) and they may be accessed in any order through a multilevel menu system. A typical course will address the various groups of topics at different times during the semester, so some guidance from the instructor will be needed in order to direct the students' effort.

The following is a brief summary of the contents of this lesson set.

Part 1 States of matter
1 Organization of molecular units
2 Forces between molecular units
3 Basic structural units of solids
4 Changes of state: phase maps

Part 2 Liquids and solutions
5 Liquids and their vapors
6 Solutions: types and formation
7 Solutions: concentrations

How concentrations are expressed
Molar concentration calculations
Common types of concentration problems

8 Solutions: physical properties

Solutions of non-volatile solutes: colligative properties
How solutes affect the:

vapor pressure
boiling point
freezing point
osmotic pressure

Solutions of volatile solutes: mixtures of liquids
Solutions of volatile solutes: gases dissolved in liquids

9 Liquids: surface tension and capillary rise

Part 3 Colloids and surfaces

10 Nature of colloids
11 Types of dispersions
12 Dispersion and coagulation
13 Surfactants

Part 4 Crystalline solids

14 Long-range order
15 How identical atoms pack together
16 The shapes of crystals
17 The simplest ionic solids
18 Chains, sheets and networks; silicate structures


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