Period._ -­
Chapter 17 Vocabulary 0-1.,.. ~ 0
Across
8. The amount ofheat needed to increase the temperature of 19 of a substance 1 degree
Celsius.
Down
1. A process that absorbs heat from the surroundings.
2. Everything in the universe not including the part you are focusing your attention on.
3. A measure ofthe average kinetic energy of particles in matter.
4. The minimmn energy colliding particles must have in order to react.
5. The heat content of a system at a constant pressure.
6. Energy that transfers from one object to another because of a temperature difference between the objects.
7. The precise measurement ofheat flow out of a system for chemical and physical processes.
8. A part of the universe on which you focus your attention.
9. A process that releases heat to. its surroundings.
I
1-­
J<EY
Name
POTENTIAL ENERGY DIAGRAM
e
Potential Energy C+D
b
f
Reaction Coordinate
A + B
-
-+ C + 0 + energy Answer the questions using the graph above.
1. Is the above reaction endothermic or exothermic?
2. What letter represents the potential energy of the reactants?
----=b=-___
3. What letter represents the potential energy of the products?
_~--=--_ __
d___
4. What letter represents the heat of reaction (L\H)? __
5. What letter represents the activation energy of the forward reaction? __
n..~
__
6. What letter represents the activation energy of the reverse reaction? _--"
~
_ _ _
7. What letter represents the potential energy of the activated complex?
e.Y\~~~ <:..
8.
Is the reverse reaction endothermic or exothermic?
9.
If a catalyst were added, what letter(s) would change?
. Chemistry IF8766
76
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CA I C l Rr..
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