CH250 Chapter 2: Chapter 2 Study Notes.docx
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These occurs spontaneously because the hbs are outweighed by the energetic push to randomness. Structure of water: dipolar nature, oxygen is more en so pulls the shared e-s closer to itself has a bond angle between the two hydrogens attached in the rough tetrahedron structure of 104. 9 . In ice: 4 hbs form the lattice, highly ordered arrangement, ice is less dense than water. Common hydrogen bonds in biological systems: hs covalently bonded to carbon atom do not participate in hbing b/c the c is slightly more en than h thus c-h is only weakly polar, bonds commonly with oxygen and nitrogen. Directionality in hydrogen bonds: stronger when the bonded molecules are oriented to maximize. Gases in water: solubility in water had nothing to do with the polarity. Enzyme-substrate complex: water moves out of the way and allows the enzyme to bind to the substrate more, enzyme-substrate interaction stabilized by hydrogen bonding, ionic, and tightly hydrophobic interactions.