CHEM 1040 Chapter 1-2: Week 0–Review
9 Sep 2018
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Document Summary
Matter exists in different forms depending on conditions. Solid: characterized by rigidity; relatively incompressible; has fixed shape and volume. Liquid: relatively incompressible fluid; fixed volume but no fixed shape. Gas: easily compressible fluid; no fixed volume and no fixed shape. Physical reaction: change in form of matter but not chemical identity of a substance. Chemical reaction: change where a kind of matter is transformed into a new kind of matter cannot be separated by any physical means. For example: rusting of iron (rust is new material formed) Physical property: characteristic of a material observed without changing chemical identity. For example: physical state, melting point, colour. Chemical property: characteristic of a material involving its chemical change. Substance: type of matter unable to be separated into other types of matter via any physical process; always has same properties. Element: substance unable to be decomposed into other simpler substances via any chemical process. Compound: substance composed of two or more elements chemically combined.
