CHEM 1050 Lecture Notes - Lecture 3: Process Function, British Thermal Unit
24 Sep 2016
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Day 3: chapter 6 breaking bonds requires energy [endothermic], making bonds gives off energy. U = ufinal - uinitial the above diagram will be on the final exam [3 points for drawing it!] because of the first law: u is given by the heat and the work heat = q. Work = w be careful with signs: i. e. a system absorbs 50j of heat, and has 20j of work done on it. U = q + w the answer is +70j. ** state function state refers to solid, liquid, or gas heat, temperature, volume, energy etc. are state functions. U is a state function depends only on the present state of a system [and not on the path] it is controlled by properties like temperature, pressure, et. c. When you apply heat, it increases u. W = p u pressure - volume - work.
