Lecture 2 presented

Individual interac7ons are brief and weak but summed

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Unformatted text preview: water, are hydrophobic (“water ­ha7ng”). 21 21 Figure 2.12 Hydrophilic and Hydrophobic 22 22 Clicker Ques7on 1 Which of the atoms in the following figure is least likely to react with carbon? a. Li b. N c. O d. F e. Ne 23 Van der Waals forces van der Waals forces: aRrac7ons between nonpolar molecules that are close together. Individual interac7ons are brief and weak, but summed over a large molecule, can be substan7al. 24 24 25 25 Building our Tree Facts ionic Hydrophobic Concepts covalent Molecular bonds Van der Waals Foundations Hydrogen Evolution Scientific Method Molecular Interactions 26 26 Building our Tree Facts ionic Hydrophobic Molecular bonds Concepts covalent Van der Waals Hydrogen Foundations Evolution Scientific Method Molecular Interactions 27 27 Clicker Ques7on 2 Which of the atoms in the following figure can form the most covalent bonds? a. Li b. C c. N d. O 28 Clicker Ques7on 3 Lithium and fluorine are most likely to form which kind of bond? a. Hydrogen b. Ionic c. Covalent 29 Chemical interactions 30 Figure 2.13 Bonding Partners and Energy May Change in a Chemical Reaction propane C3H8 oxygen carbon dioxide water 5 O2 3 CO2 4 H 2O heat, light, energy BANG This reaction is complete. 31 31 Chemical Reac7ons This is a type of reac7on called an oxida.on–reduc.on reac7on. Electrons and protons are transferred from propane (the reducing agent) to oxygen (the oxidizing agent) to form water. Many chemical rea...
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