CHEM 11a Chapter Notes - Chapter 1: Scientific Method, Distillation, Sweet Tea
30 Sep 2015
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The scientific approach to knowledge: definitions/concepts/people, plato- learn through reason. Physical world= representation of perfect and transcendent world: antoine lavosier (studied combustion) used real scientific method of observation and experiment. Law of conservation of mass: hypothesis (falsifable) tentative interpretation or explanation of the observations. Atoms are rearranged in chemical reactions, so mass remains the same. The classification of matter: definitions/concepts/people, matter- anything that occupies space and has mass, substance- specific instance of matter (e. g air, water, or sand), state- physical form. Physical+ chemical changes and physical and chemical properties: definitions/concepts/people, physical changes-changes that only alter state or appearance. Atoms or molecules that compose do not change identity (boiling water): chemical changes changes that alter the composition of matter. Energy: a fundamental part of physical and chemical change: definitions/concepts/people, energy- capacity to do work, work- action of a force through a distance, ke motion energy.
