Chemistry 1302A/B Lecture Notes - Lecture 3: Vacuum Chamber, Thermochemistry, Thermodynamics

• School: Western University
• Department: Chemistry
• Course: Chemistry 1302A/B
• Professor: Felix Lee

Document Summary

Thermodynamics: a study of the energy change or energy transfer related to physical and chemical process thermochemistry a branch of thermodynamics studies the change in heat energy of chemical reactions. There"s a difference between calories as their studied in food sciences (on our nutritional labels) and calories we will use to study heat. We convert that for chemistry to our little c, cal cal = 1/1000 cal. Closed: flask sealed with a stopper where minimal heat can escape. Isolated: flask sealed in a vacuum chamber where no heat can escape. Energy in a thing that comes in many forms heat kinetic potential ->stored energy. Two types studied in chem: heat and pv work (pressure volume work) When you compress a gas, it requires you to do pv work to the gas itself (and thus increase it"s energy). When the gas expands and moves an object, it does work on the object.