CHEM102 Lecture Notes - Lecture 29: Reaction Quotient, Hydrogen Bond
17 Apr 2018
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CHEM102 Full Course Notes
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Free energy: temperature, pressure and concentration effects: some entropy rules: Cyclic compounds have much more restricted movement, so fewer microstates available. Ionic solutes have much more freedom of motion is water. So, when dissolved in water will produce a large change in entropy. If hydrogen bond forms, it reduced the freedom of motion. Absolute entropy of elements in their standard states is not zero. Answers obtained are not always accurate because we use standard enthalpies and entropies: effect of temperature on reaction spontaneity: Reaction is spontaneous at all temperatures if delh <0 and dels >0. Reaction is nonspontaneous at all temperatures at all temperatures if delh >0 and dels. Reaction becomes spontaneous when temperature increases if del h >0 and del s >0 delg becomes more negative as t increases. Reaction becomes spontaneous as t decreases when del h <0 and del s <0. Del g becomes more negative as t decreases: effect of pressure and concentration:
