CHY 204 Chapter Notes - Chapter 2: Van Der Waals Force, Bond-Dissociation Energy, Colligative Properties
20 Feb 2014
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Document Summary
Edward buchner in 1897 germany, discovered yeast extracts can ferment sugar. Life can be studied & explained outside a cellular context; he showed chemistry & not vital forces are responsible for life processes giving rise to biochemistry. There are attractive forces b/w h2o molecules & b/w h2o & solutes due to hydrogen bonding which results in the strength & specificity of recognition among biomolecules (also influenced by h2o"s solvent properties). H+ & oh- which influence the structure, self-assembly& properties of all cellular components, incl pro, na & lipids. This tendency forms the ph scale & is involved in buffers (controls # of protons in soln). H2o has a higher mp, bp & heat of vaporization than most other common solvents (table 2-1) due to hydrogen bonding b/w h2o molecules & a lot of energy is req to overcome these attractive forces.
