CHEM 1061 Chapter Notes -Isolated System, Rotation Around A Fixed Axis, Electric Light
Document Summary
Potential energy: capacity to do work; objects that can do work either b/c of their composition or b/c of their location have potential energy. Ex: water behind dam: stored = potential energy; when pipe opened, some potential energy = converted to kinetic energy use water to turn blades of generator potential energy from beginning electrical work. Thermochemistry: study of energy changes that occur during physical processes and chemical rxns (reactions) (branch of broader study thermodynamics: relationship btwn heat and work) Say 2 things exchange energy (not one thing loses/gains energy) Open system: can exchange matter/energy/both w/ surroundings. Closed system: may exchange energy, but not matter w/ surroundings. Isolated system: exchanges neither energy nor matter w/ surroundings. Internal energy (u) of system = total energy contained w/in system, partly kinetic, partly potential: kinetic energy comes from motion @ molecular level. Vibrational motion: displacement of atoms w/in molecules.
