CHEM1161 Lecture Notes - Decimal Mark, Joule, Heat Equation
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Matter: anything that has mass and occupies space. Homogeneous mixtures: composition is uniform throughout, i. e brass. Heterogeneous mixture: the composition varies from one part of the mixture to another, part of the mixture are visible. Solids: a definite shape, a definite volume, particles that are close together in a fixed arrangement, particles that move very slowly. Liquids: indefinite shape but a definite volume, same shape as container, particles close together but mobile, particles that move slowly. Gases: indefinite shape and volume, the same shape and volume as their container, particles far apart, move very fast. Physical properties: characteristics observed or measured without changing the identity of a substance, include shape, physical state, boiling and freezing point, density, color, ex: copper- reddish orange, shiny, conductor of heat, Physical change: change of state, change in the physical state, no change in identity or composition, ex: tearing piece of paper.
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