CHEM 1330H Study Guide - Midterm Guide: Jmol, Atomic Radius, Bromine
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Triangle vs. double bond ex2. piece of wax melting; alcohol evaporating; solid explosive converting to gas. If moles of gas dec ex. g s. Free energy change: gsys = hsys - t ssys. Measure of the spontanuity of a process and of the useful energy available from it. Calculate grxn from enthalpy and entropy values: hrxn, srxn, gsys. Effect of t on reaction spontanuity: t = h / s ex. at 25 c, the reduction of copper (i) oxide, cu2o, is nonspontaneous. Calculate the temp. at which the reaction becomes spontaneous: t= h/s. = 58. 1/0. 165 = 352k: at any temp above 352k, the reaction becomes spontaneous. Second question on fr: what is the sign of deltag for a spontaneous process. Small change in g large change in k. Qk ; q/k > 1 so lnq/k > 0 ; and g>0.
