14 - Chemistry 11500 L e c tu r e 1 4 R e a d i n g : S e c...

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1 Chemistry 11500 Lecture 14 Reading: Sections 10.1-10.3, Molecular shape, biological receptors, the sense of smell p. 386-387 Shapes of Molecules: VESPR Theory
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2 Week 8, next week • Fall Break! • Homework due on Friday • Lab: Enthalpy of Solution
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3 Enthalpy of Solution Lab Is Formation of a Solution Accompanied by Evolution or Absorption of Heat? Chapter 5 in the lab manual (prelab on pp. 33-34) Read Section 6.3 in the textbook: Calorimetry Work in groups of four. Determine q and Δ H
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4 You must wear your goggles in lab AT ALL TIMES , including while writing the report. Lab Safety - Goggles If you take your goggles off in lab, you will receive no credit for the lab.
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5 How do chemists think about molecular shape?
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VSEPR • V alence S hell E lectron P air R epulsion –predicts the shapes of molecules • Principle: Valence shell electron units around a central atom will arrange themselves so that they are as far from each other as possible. ( minimizing their repulsions
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14 - Chemistry 11500 L e c tu r e 1 4 R e a d i n g : S e c...

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