AHSS*1040 Chapter 11: AHSS*1040 Chapter 23
Document Summary
Law 1: change in e of a system is = to heat added to system work done by system. [change in e (u) = q (heat added) w (work done)] Car"s e = heat release by burning gasoline work done to move car. Often called law of conservation bc e neither created or destroyed. Law 2: impo to make a heat engine that does nothing but work o. Law 3: impo to reach abs zero in a finite # of steps. At abs zero (-273. 15 c), system has no e bc perfectly ordered at that temp. Entropy is a useful measure of the degree of chaos in a system, it usually incr in everyday life because almost every activity uses e, explosion is a dramatic ex. Growth of cells in plants + animals is exception, create a degree of order from surrounding disorder o o o o o.
