CHEMENG 2D04 Lecture Notes - Lecture 6: Billiard Ball, Radiant Energy, Kinetic Energy
10 Sep 2016
School
Department
Course
Professor
Document Summary
Chapter 6 thermochemistry: energy & work page 279. Energy capacity to do work (si units: joules) work . Classi cation of energy think of energy as something an object possesses. Heat (q) one way energy can be transferred. Heat ows when two objects of different temperature are in contacts. Other way s energy transferred by work (w) kinetic energy. Energy that is transferred between two or more things. Energy associated with temperature change also a type of kinetic energy. Potential energy e. g holding a billiard ball above the ground, gravitational potential energy (obvious) or the chemical energy stored in a propane tank (not so obvious) Electrical kinetic energy associated wit ow of electrical charge. Heat or thermal energy kinetic energy associated with molecular motion. Amount of kinetic energy an object has is directly proportional to its mass and velocity ke=1 2mv^2. Joule (j) amount of energy needed to move 1 kg mass a distance of 1 meter j=nxm=kgxm2/s2.
