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| Goal
I. Know the vocabulary and basic concepts of thermochemistry that describe
and explain energy changes accompanying chemical reactions. |
Objectives: To meet the requirements of Goal
I, you must be able to:
-
differentiate
between
system
and surroundings, between potential energy and kinetic
energy,
between exothermic and endothermic processes;
- describe the
sign (+ or -) conventions for heat, work, and thermal energy
(q);
- convert among
the units: calorie, kilocalorie, joule and kilojoule;
- distinguish between
specific
heat and heat capacity;
- use
equations: thermal
energy = (mass)(specific heat)(temp); thermal
energy change = (heat capacity)(temp. change)to calculate
any variable, given appropriate data. [Top]
| Goal II. Apply the principles
of thermochemistry to calorimetric data collection and calculations. |
Objectives: To meet the requirements of Goal
II, you must be able to:
- explain the experimental
procedure of calorimetry, and describe a simple constant pressure
calorimeter (coffee cup calorimeter);
- apply
the law of conservation of energy to thermal energy changes taking
place in a calorimeter;
- use
calorimetry data to calculate specific heat, Dt,
final temperature, and heat of solution. [Top]
| Goal III. Use Hess's Law
and heats of formation to calculate enthalpy changes during a chemical
reaction. |
Objectives: To meet the requirements of Goal
III, you must be able to:
- relate enthalpy
change (DH)
to thermal energy change at constant pressure; identify
exothermic
and endothermic reactions from thermochemical equations;
- recognize DH
to be an extensive property; use a thermochemical equation to determine
DH
for a specified amount of reactant or product;
- state Hess's
Law and relate this law to changes in a state function such as enthalpy;
use this law to determine DHrxn
by combining thermochemical equations;
- define the
standard heat of formation (DH°¦),a
nd know the standard conditions for thermochemical reactions;
- write appropriatechemical
equations for specific examples of DHrxn
including DHcomb,
DHvap,
DHfus, and DH°¦;
- calculate enthalpies
of reaction from enthalpies of formation;
and calculate enthalpies of formation
from enthalpies of reaction. [Top]
|
Unit 6 Assignments
|
| Read: |
Text
Chapter 6, pp. 236-261 |
| Video
Programs: |
- Energy
- Enthalpy Changes
and Calorimetry
- Heats of Reaction,
Hess's Law
|
| Textbook
Assignments: |
Read
and Understand all "Sample Problems," "Follow
Up Problems" and select any 5 blue-colored problems at the
end of the chapters.
The
answers for the Follow Up Problems are at the end
of the chapter; the answers for the blue-colored
problems are in Appredix E. |
| Mandatory ChemSkill Builder Assignments to be submitted for grade (Scores of 80% or higher on each assigned HW section will receive full credit. ) |
Mandatory
assignments to be submitted for grade
Chapter 8, Sections
8.1, 8.2, 8.3, 8.4, 8.5, 8.6 |
| Do CyberLab 16 and Prelab Expt. 9 |
See Lab Guide;
Submit in BB Assignments. |
| TAKE
EXAM 3: |
Exam
3 Covers Units 5 and 6. |
| Note:
Complete Solutions, including all units of measurement,
must be shown for all problems. |
[Top]
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