CHEM 1211 Lecture Notes - Lecture 1: Nature Chemistry, Kinetic Energy, Chemical Change
Document Summary
Scienti c method: hypothesis- a possible explanation for an event that is falsi able, law- general principals of nature, theory- con rmed and accepted explanation of laws of nature. Chemistry- study of matter, its properties, changes that matter undergoes and energy associated with these changes: matter- anything that has mass and occupies space, pure substance, element, compound, mixture, homogenous, heterogeneous. Diatomic atoms: h, n, o, f, cl, br, i. Properties- characteristics giving each substance a unique identity: physical properties- showed by itself without interacting with another substance (color, melting point, boiling point, density, chemical properties- how the substance interacts with other substances ( ammability, reactivity, toxicity) ***physical and chemical changes may result in different physical properties but only chemical changes result in different physical properties*** Energy- ability to do work: potential energy- energy due to position of object, kinetic energy- energy due to motion of object.
