Chemistry 1302A/B Midterm: Chapter 4 - Thermodynamics.docx

• School: Western University
• Department: Chemistry
• Course: Chemistry 1302A/B
• Professor: Elizabeth Gillies

Document Summary

Study of the energy changes involved in physical and chemical processes: physical processes. Changes in physical parameters volume, pressure: chemical processes. Thermochemistry: branch of thermodynamics that investigates the heat flow that occurs during chemical reactions. Heat system: quantitative measure of thermal energy transferred into or out of a, caused by the temperature difference between the system and surroundings or a chemical reaction, always flows from warmer object to cooler object. Important to distinguish a system from its surroundings. Isolated system: can exchange both matter and energy with its surroundings, can exchange energy but not matter with its surroundings, cannot exchange energy or matter with its surroundings. Defined as the capacity to do work. Types of energy: heat energy (thermal) Energy transferred due to a temperature difference between system and surroundings: kinetic energy. Energy associated with motion: potential energy. Stored energy or energy a body possesses due to its position. Ex. roll on top of the hill: chemical energy **