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
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
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
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.
Standard Enthalpies of Formation/ Standard Heats of Formation
Formation reactions are reactions in which a compound is formed from its element.
For example: methane, CH4 is formed from the elements solid carbon (graphite) and hydrogen
C(s) + 2H2(g) C
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
Energy is the capacity of a system to do work (i.e. make an object move).
Thermochemistry is the study of energy changes during physical and chemical changes.
Potential energy is energy due to position or composition. The energy associa
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.
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
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
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.
- 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
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
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
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
Polarity of functional
-OH is very polar bond;
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
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
SCH 4UI Polymers Independent Study Unit
Specific Expectations of SCH 4UI met in the Organic Chemistry strand in this ISU:
A1.3 identify and locate a variety of print and electronic sources that enable them to
addressresearch topics fully an
SCH4U: Properties and Reactions of Alcohols Lab
Purpose: To investigate the properties and reactions of alcohols.
- Draw structural diagrams for each of the alcohols that will be investigated.