Biology 1001A Lecture Notes - Lecture 4: Niagara Falls, Chemical Energy, Thermodynamics

• School: Western University
• Department: Biology
• Course: Biology 1001A
• Professor: Tom Haffie

Document Summary

First law of thermodynamics, second law of thermodynamics, Distinction among the terms: exothermic, endothermic, exergonic, endergonic why the breakdown of glucose increases entropy. 4. 1a: energy exists in diferent forms: diferent forms of energy readily transformed from one to another, all types are either kineic or potenial, kineic energy. Energy possessed by an object in moion. Falling rock, waves, electricity (because it"s the low of electrons: potenial energy. Stored energy of an object because of its posiion or chemical structure. Also called chemical energy: chemical energy of a molecule has to do with posiions of electrons within its atoms. Farther an electron is from nucleus, greater the potenial energy it possesses. Negaively charged electrons atracted to posiively charged nucleus. As it moves closer to nucleus it loses energy. Electrongaivity of an atom strongly inluences potenial energy it possesses. More electronegaive atoms contain less potenial energy: 4. 1b: laws of thermodynamics describe energy and its transformaions.