CHEM 120 Lecture Notes - Lecture 5: Thermodynamics, Chemical Bond, Gas Thermometer

• School: McGill University
• Department: Chemistry
• Course: CHEM 120
• Professor: Bradley Siwick

Document Summary

Thermochemistry: branch of thermodynamics that investigates flow of energy into or out of chemical reactions (heat, from this we can deduce the energy stored in chemical bonds. System: all the materials involved in process under study. Surroundings: the rest of the universe or these materials outside of the system with which the system interacts. The interface between a system and its surroundings is called a boundary: free to exchange both matter and energy with surroundings (open beaker( Closed system: free to exchange only energy with its surroundings (sealed flask) Isolated system: exchanges neither mass nor energy to surroundings. Energy: it is the capacity to do work. Work: work is done when a force acts through a distance. Kinetic energy: energy associated with motion of a body or particles within it. Potential energy: energy due to condition, position or composition, associated with forces of attraction or repulsion between objects, chemical bonding.