Tetrahedral Electronic Geometry:
AB3U Species (One Lone Pair of
Electrons on A)
Some examples of molecules with this geometry are:
NH3, NF3, PH3, PCl3, AsH3
These molecules are our first examples of central
atoms with lone pairs of electrons.
Thus, the el
Chapter 5 - Thermochemistry
1) understand the concept of conservation of energy (1st Law of Thermodynamics).
2) understand the relationship between total internal energy, work, and heat.
3) understand the concept of
There is no delight in owning anything
-Seneca (Roman Philosopher 1st Cent. AD)
Covalent Bonds (2 pts or 1pt)
Which point on the graph represents the distance at
which the H-H bond in molecular hydrogen (H2) is
and Bonding Theories
Two Simple Theories of
Valence Shell Electron Pair Repulsion
J. Gillespie - 1950s
Valence Bond Theory
L. Pauling - 1930s & 40s
Study of the 3
Chapter 7 Chemical Bonding and Molecular Geometry
Chemical Bonding and Molecular
Figure 7.1 Nicknamed buckyballs, buckminsterfullerene molecules (C60) contain only carbon atoms. Here they are
shown in a ball-and-stick model (left).
California State University-San Bernardino
Department of Chemistry and Biochemistry
Exam 1 Study Guide
Chapter 12: Introduction of Organic Chemistry: Alkanes
1- Identify the characteristic properties of organic vs inorganic compounds.
2- Know the trends o
Thermochemistry: Energy Changes in
Energy as a Reactant or a Product
Transferring Heat and Doing Work
Enthalpy and Enthalpy Changes
Heating Curves and Heat Capacity
Chapter 3 & 4 Exam Practice
Question 3 - Multiple Choice
What is the stoichiometric coefficient for oxygen when the following equation is balanced using
the lowest, whole-number coefficients
_ C3H8O(l) + _ O2(g) _ CO2(g) + _ H2O(l)
Chapter 5 Exam Practice Problems
Which of the following is not a type of energy or energy transfer?
A) chemical energy
The first law of thermodynamics
A) defines chemical energy.
B) defines entropy.
C) is a statement of cons
In-class Activity: Thermochemistry
1. Chris the Chemist wants to make hot tea. He puts 0.180 kg of distilled water at 19.0 C in a heat resistant, insulated cup. He then uses an electrical heating device to transmit 5.80 x 10 4 J of energy to the
Atom, Molecule, Element or Compound?
Imagine a piece of aluminum foil. Aluminum is an element (Al, #13 on the
periodic table). A piece of aluminum foil contains billions and billions of pieces of
individual aluminums. These individual pieces are called at
Reactions in Aqueous Solutions
Double displacement/double replacement/metathesis reactions
o In general, we are going to swap ions in solution.
AX + BY AY + BX
o Precipitation reactions and acid-base (neutralization) reactions
o Looking for the formation
You need to memorize the following conversion factors and constants. All others
will be given to you if necessary on an exam.
Table 1.1 and Table 1.2 in your textbook
K = C + 273.15
1 inch = 2.54 cm
1 mile = 5,280 feet
1 foot = 12 inches
1 yard = 3 feet
Determine the number of valence electrons.
Place atoms around central atom using single bonds.
Determine the number of remaining electrons and
complete octets on the terminal atoms.
Do you have any electrons left?
Place remaining electrons
on the cent
Steps to Drawing Lewis Structures
1. Count the total number of valance e For anions: add electrons
For cations: subtract electrons
Cl, Br, I
S, P, Se
Typical # of
bonded e- pairs
3, or 4
2 or 1
1 or more
2 or more
This is another version of Table 1.2 in your textbook. It is just in a different format. You do not have to use them in this
format, and if you have memorized the other variations instead, its fine. But if you are looking for a simple list to
Chapter 6: Electronic Structure and
Periodic Properties of the Elements
HW due EOD 11/13/2016
Electromagnetic Radiation (Light)
Early theories of light (Newton) speculated that it
was made of particles
By the end of the 19th century, the classical
Chapter 5: Thermochemistry
90% of the energy we use comes from the sun
What happens to light from the sun that hits the
The Law of the Conservation of Energy
Combination Reaction: two or more substances
combine to form one product.
3 - 1
Describes proportions of reactants (the
substances that are consumed) and products
The Central Science
What is Matter?
Other forms of matter?