REDOX_Summary (1) - Patterns At both the macro and the...

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Patterns At both the macro and the micro levels… What are the similarities among systems? What are the differences among systems? Atoms Simple Molecules Chain Molecules Molecular Structures Cells Cellular Communities
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Concepts to review: Van der Waals Covalent, ionic, hydrogen bonding Electronegativity Polar vs. non-polar covalent bonds Redox Chemistry
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Water -Polar covalent bonds and angular structure create a DIPOLE across the water molecule -H-bonds can form between water molecules and so water has higher than predicted mp, bp, surface tension and allowed LIFE to form on Earth
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Hydrogen Bonds 12 - 30 kJ/mol; Ionic bonds in water also ~ 20! Covalent bonds 400 kJ/mol
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ΔG = ΔH = T ΔS A –ve ΔG indicates an exergonic spontaneous rxn An exergonic reaction can be coupled to an endergonic one to allow that rxn to move forward – allowing the formation of order
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Hydration shells allow polar molecules/atoms to dissolve. Water molecules surround the polar and ionic solute molecules by ATTRACTION. As a result they block the attraction of solute molecule to other solute molecules.
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REDOX_Summary (1) - Patterns At both the macro and the...

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