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Chemistry 112 Sections 5-9
Please don’t sit in the last four rows.
And, thanks.
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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
• Be here every single day• Be here on time• Don’t sit in back• Don’t talk when I’m talking• Don’t let me talk when you’re talking• It’s ok to get up and wander• Pick up handouts, generally in back• You are responsible• Be nice• Trust me
Classroom Rules
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Business III
• 3 Hour Exams• OWL Homework• Labs• Final Exam
Grades
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Business IV
If I fail the lab,
Recite After Me:
I fail the course.
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Review: Bonding
When atoms stick together, that’s bonding.
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Why do Covalent Bonds Form?
Electrons on oneatom attracted tonucleus of other atom
Nucleus on each atom repels other nucleus
Electron on each atom repels other electron
If new attractions > new repulsions, then a bond forms
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Determining Molecular Geometry
Valence Lewis Electron-Pair MolecularElectrons 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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Enthalpy of hydration:
Trends:
Ion-Dipole Forces: Between dissolved ions and polar molecules
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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 mT = 22 oCHumidity = 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