Quiz Introduction to Enthalpy
1. Consider any exothermic reaction that you choose (use A, B etc for reactants). It
must be plausible, balanced and include all states. Furthermore, assume that the
magnitude of the enthalpy change is 100kJ/mol.
SCH4U - Thermochemistry Problem Set
Date: Monday November 26th 2012
Part A: Calorimetry and Enthalpy
(1) A student places 50.0 mL of liquid water at 21.00 C into a coffee-cup calorimeter. She places a sample
of gold at 100.00 C into the calorimeter.
1. Write the lUPAC name or draw the structure for each of the following.
NV - W W
heptane 5 LEE; MM 5, dMoth/ikaftzmg
C7 (1919qu a7CL010eJ>L~IL
3, 6- dimethylnonane
3 , oihmeit7
. 0/ ?e 47 Cj (10? 9/41 Q. 4-ethy|-7-methyldecane
1. Answer the following.
a. What is the general formula for an alkane? _
b. If a saturated alkane had 15 carbon atoms in it, how many hydrogens would there be? _
2. Draw all of the possible structure of following types of hydrocarbons us
4U Organic Molecule Assignment
Perform the following tasks related the organic molecule that you have chosen. The organic molecules
must have societal / environmental implications.
You must submit your work prior to the review date.
All submitted work mus
- Explaining Reaction Rates -
Collision theory states that chemical
reactions can occur only if reactants collide
with proper orientation and with enough
kinetic energy to break reactant bonds and
form product bonds
Energy Changes in Chemical and Nuclear Reactions.notebook
December 04, 2013
Energy Changes & Rates of Reactions
Learning Goal: I will be able to distinguish:
potential and kinetic energy; endothermic
and exothermic rxns; fusion and fission
Calculating H using Bond Energies
This is a less accurate method than calorimetry.
Bond energy is the average energy needed to break a given type of bond. From the table
below, you can see that a double bond is not only shorter than a single bond but also
Factors Affecting Reaction Rates
Purpose: To identify factors that affect the rate of a chemical reaction.
Principles: A chemical reactions rate is expressed as a change in a reactants (or products) concentration per
unit of time. That is to say: the grea
Polarity of functional
-OH is very polar bond;
THE JET FUEL; HOW HOT DID IT HEAT
THE WORLD TRADE CENTER?
The Federal Emergency Management Agency (FEMA) report into collapse of the WTC towers, estimates that about 3,500 gallons
of jet fuel bu
Specific Heat and Heat Capacity Worksheet
The temperature of 335 g of water changed from 24.5oC to 26.4oC. How much energy did
this sample absorb? c for water = 4.18 J/goC
(ans. 2.66 kJ)
How much energy in kilojoules has to be removed from 225g of w
Enthalpy is a state function; the change in enthalpy in going from some initial state to
some final state is independent of the pathway. This means that in going from a particular set of
reactants to a particular set of products, the change in e
Nearly every chemical reaction occurs with either the absorption or
release of energy. The study of such energy transfers is
System refers to what is being studied. In chemistry, the balanced
chemical equation indicates th
Calorimetry and Hesss Law
Energy changes occur when 1) two materials at different temperature exchange energy
2) energy is lost or gained during a chemical reaction when
reactants are converted to products. (Text page 288)
1) Heat exchange
Unit 3- Thermochemistry, Energy and Rates of Reaction
Review of Grade 11 Material
From here on, in this course you will be working with moles, molarity, volumes, mass and other
measuring concepts. YOU NEED TO REVIEW GRADE 11 MATERIALS! If you cannot do
All alcohols contain an -OH group. This is shown in a name by the ending ol. The number
indicating where the OH group is located is placed after the parent alkane name but before the
Example 1: Write the structural formula for methanol.
Aldehydes and Ketones
Aldehydes and ketones are carbonyl compounds. Aldehydes and ketones are simple compounds
which contain a carbonyl group - a carbon-oxygen double bond.
Examples of aldehydes
All aldehydes contain the group:
In aldehydes, the carbonyl
Carboxylic acids contain the -COOH group, which is better written out in full as:
Carboxylic acids are shown by the ending oic acid. When you count the carbon chain, you have
to remember to include the carbon in the -COOH group. That carb
Making Ice Cream in the Lab
1/2 cup milk
1/2 cup whipping cream (heavy
1/4 cup sugar
1/4 teaspoon vanilla or vanilla
1/2 to 3/4 cup sodium chloride
(NaCl) as table salt or rock salt
2 cups ice
1-quart ZiplocTM bag
SCH 4U - Determination of the Order of a Simple Reaction
In this experiment you will measure the time required for magnesium metal to react with
hydrochloric acid solutions of various concentrations. From these data, you can calculate
HESSS LAW LAB
Germain Henry Hess found that the enthalpy changes for a series of reactions can be
added together to describe the energy change for the overall reaction. This relationship, known
as Hess's Law, will be studied.
1) A student is asked to determine the molar enthalpy of neutralization, Hneut, for the reaction
represented below. The student combines equal volumes of 1.0M HCl and 1.0M NaOH in an
open polystyrene cup calorimeter. The heat released
Alcohols, thers, Aldehydes, and KeTones
Name The following compounds.
2 -\,mr\ol 2; [40604er
kaxm Zo l
C7CLOWWQ- cl7clpf>eulane - l '3 -6llo l
26,le - Firm .
Naming Organic Compounds
It was once believed that compounds found in and produced by living things were infused with a vital
force setting them apart from inorganic compounds. In 1828 German Chemist Friedrich Whler
synthesized urea (an important co