Horvath Practice Problems 102

Horvath Practice Problems 102 - both. (a) melting of ice at...

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If 4 G is negative then the free energy can be used to do work. If 4 G is positive then work must be done on the system to get the process to go in the nonspontaneous direction. There are several ways 4 G can be negative. If 4 G is negative because the reaction is very exothermic ( 4 H< 0 ) then we say the reaction is energy driven. If 4 G is negative because the reaction is the entropy increase then we say the reaction is entropically driven. Reactions can be energy driven, entropically driven, or both. Group Work 1. Consider the following spontaneous processes and state whether they are energy drive, entropically driven, or
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Unformatted text preview: both. (a) melting of ice at room temperature (b) condensing of steam at room temperature (c) combustion of benzene into carbon dioxide and wa-ter. (d) the rusting of iron 2. Consider the e f ect of temperature on 4 G. (a) At what temperatures is enthalpy the more impor-tant factor? (b) At what temperatures is entropy the more importing factor? (c) A reaction that will not occur at 100K will occur at 500K what must be true? (d) A reaction that will occur at 100K will not occur at 500K what must be true? GIBBS FREE ENERGY 101...
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This document was uploaded on 11/01/2011 for the course CHM 2046 at University of Florida.

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