CHEM 1050 Study Guide - Comprehensive Final Guide: Rate Equation, Sodium Amalgam, Exothermic Welding
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28 Nov 2016
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In order to break a bond energy is needed. Forming a bond gives off energy ( that we can see as heat) State and changes of state: conditions that describe the state. If heat is given off exothermic-all combustions if heat is absorbed, endothermic of the system( mass, temp, volume) P, v, t are called state variables: given upper case symbols. State function: only depends on state of system; difference between start and end. Path: depends on how you got from start to finish. U : is the sum of the kinetic and potential energy of the particles making up the system. Heat is given symbol q and work is given symbol w. Q: is measured by determining temp change, which is converted from *c to joules: q= ccal x t, q= m x c x t if temp goes up qcal = +ve and therefore qchemical = -ve.
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