Chemistry 112 Sections 59

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Chemistry 112 Sections 5-9

• Please dont sit in the last four rows.
• And, thanks.

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Chemistry 112Sections 5-9

• Bill Vining
• 232 PSCI
• 436-2698
• viningwj_at_oneonta.edu

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You should have had

• General Chemistry I
• Up through drawing Lewis Structures and
  Determining Molecular Structure and Polarity

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General Chemistry I

• Basics of Atomic Structure
• Chemical Reactions and Equations
• Stoichiometry
• Solution Chemistry, mainly in water
• Thermochemistry
• Electronic Structure of Atoms
• Properties of Atoms
• Ionic Bonding
• Covalent Bonding of p-Block Elements
• Properties of Gases

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General Chemistry II

• IMFs and Properties of Liquids, Solids, and
  Solutions
• Control of Chemical Reactions and Stability
• Thermodynamics
• Kinetics

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General Chemistry II

• Special Types of Chemical Systems
• Organic
• Equilibrium
• Acid-Base
• Dissolution
• Complexation
• Electrochemical

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Business
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Class Rules

• Syllabus

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Business I

• Class meetings
• Lecture MWF here
• Lab once a week in Physical Sciences Bldg.
• Recitation once a week in Physical Sci. Room 122.
• NO LABS or RECITATIONS this week- they start
  Monday

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Business II
Classroom Rules

• Be here every single day
• Be here on time
• Dont sit in back
• Dont talk when Im talking
• Dont let me talk when youre talking
• Its ok to get up and wander
• Pick up handouts, generally in back
• You are responsible
• Be nice
• Trust me

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Business III
Grades

• 3 Hour Exams
• OWL Homework
• Labs
• Final Exam

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Business IV
Recite After Me

• If I fail the lab,

I fail the course.
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Review Bonding

• When atoms stick together, thats bonding.

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Why do Covalent Bonds Form?
Electrons on one atom attracted to nucleus of
other atom
Nucleus on each atom repels other
nucleus Electron on each atom repels other
electron
If new attractions gt new repulsions, then a bond
forms
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Determining Molecular Geometry

• Valence Lewis Electron-Pair
  Molecular
• Electrons Structure Geometry Geometry

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Chapter 11Properties of Liquids and Solids

• Formula ? Lewis Structure ? Electron Geometry ?
• 
  Molecular Geometry ? Polarity ?
• 
  Intermolecular Forces ? Properties

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What happens when water boils. Draw pictures.
Bonding vs. Intermolecular Forces (IMFs)
Where do IMFs come from?
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Types of forces between molecules Intermolecular
Forces (IMFs)
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Ion-Dipole Forces Between dissolved ions and
polar molecules
Enthalpy of hydration Trends
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Dipole-Dipole Forces Between polar molecules
Trends
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Dipole-Induced Dipole Forces Between polar and
nonpolar molecules
Trends
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Induced Dipole-Induced Dipole Forces Between
nonpolar molecules
Trends
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Hydrogen Bonding Molecules with F-H, O-H, or N-H
bonds
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Hydrogen Bonding Properties of water
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Hydrogen Bonding Properties of water
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More on Boiling Points and Hydrogen Bonding
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Identifying IMFs
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Relative Contributions of Different IMFs
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• Properties of Liquids
• Vapor Pressure (volatility)
• Boiling Point
• Enthalpy of Vaporization
• Viscosity
• Surface Tension

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Molecular interpretation of vapor pressure and
boiling.
Enthalpy of vaporization
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Clausius-Clapyron Equation Vapor Pressure,
?Hvap, and T
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Graphical Method of Determining Enthalpy of
Vaporization
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Example 2. What is the mass of water in the air
in this lecture hall? 14 m x 5 m x 17 m T 22
oC Humidity 43
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Example 3. A 1-L flask of air is at 30 oC and
relative humidity of 68. The flask is put in a
freezer and the temperature decreases to 5 oC.
What happens?
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Surface Tension