01:160:161 Lecture Notes - Lecture 2: Chemical Change, Chemical Formula, Antoine Lavoisier
Document Summary
Chemistry: the study of matter, the change it undergoes, and energy associated with these changes. It is studied from the molecular level to explain things at the macroscopic level. Matter: anything that has mass and occupies pace. Energy: the capacity to do work: kinetic energy: energy associated with motion, potential energy: energy associated with structure, composition, position. Atoms: the basic unit of an element that can enter into chemical combination (still has properties) (democritus 460-370bc: atomos = indivisible) when these atoms connect and bond, give rise to various types of compounds. The arrangement of these bonds and atoms determines the properties. Classification of matter: physical state, solid - fixed shape and volume due to close particles. Strong potential energy in comparison to kinetic energy cause particles to vibrate, close together, and maintain shape: liquid - fixed volume with changing shape, gas-shape and volume determined by container.
