CHEM 1320 Lecture 1: CHEM 1320: Lecture 1-2
Document Summary
A. the study of matter, its properties, the changes that matter undergoes, and the energy associated with these changes. The scienti c approach to knowledge: based on observation and experiment. 1. observation: describe or characterize behavior of nature: often lead to a hypothesis. 2. hypothesis: tentative interpretation of the observations a) falsi able (1) experiments may support a hypothesis or prove it wrong. 3. scienti c law: statement that summarizes past observations and predicts future ones a) law of conservation of mass: in a chemical reaction, matter is neither created nor destroyed : allows prediction of future observations. 4. theory: based on hypothesis, explains what nature does and why, and is validated by experiments. Classi cation of matter: details, matter has mass and volume. 4. different types and amounts of simpler substances within characteristics identifying a substance physical and chemical properties. 1. elements: on the periodic table and expressed by a chemical formula.
