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WorksheetsThermochemistry Test Review!
Total questions: 39
Worksheet time: 45mins
Name
Class
Date
1.
The reaction container feels warm
a)
endothermic
b)
exothermic
2.
∆H is positive
a)
endothermic
b)
exothermic
3.
The products contain more energy than the reactants
a)
endothermic
b)
exothermic
4.
Energy is absorbed by the system
a)
endothermic
b)
exothermic
5.
Exothermic reactions are reactions that
a)
release heat
b)
do not involve heat
c)
absorb heat
d)
take place instantaneously
6.
Which of the following would NOT speed up a reaction?
a)
decreasing the temperature
b)
increasing the temperature
c)
lowering the activation energy
d)
stirring
7.
A process that absorbs heat is a(n) ________ process.
a)
endothermic
b)
polythermic
c)
ergothermic
d)
exothermic
8.
The minimum amount of energy needed to start a reaction is called the
a)
activation energy
b)
surface area
c)
concentration
d)
catalyst
9.
A sample of iron receives 50.J of heat energy that raises the temperature of the iron 25.0°C. If iron has a specific heat of .10 J/g°C, what is the mass of the iron sample?
a)
25g
b)
30g
c)
20g
d)
50g
10.
As a reaction is taken place, the student notices that the temperature has dropped. This indicates that the system has increased in energy. What type of process is this?
a)
Endothermic
b)
Exothermic
11.
As someone is running on the track they begin to perspire. This is an example of an
a)
endothermic process
b)
exothermic process
12.
For the formula:
Q= m c ∆T
The units for specific heat are:
Q= m c ∆T
The units for specific heat are:
a)
g /J C
b)
°C/g J
c)
kJ/g
d)
J/g°C
13.
Is the combustion of gasoline endothermic or exothermic?
a)
Endothermic
b)
Exothermic
14.
In an endothermic reaction the system is releasing energy.
a)
True
b)
False
15.
In an exothermic process, the surroundings are are gaining energy.
a)
True
b)
False
16.
What letter represents boiling?
a)
B
b)
C
c)
D
d)
E
17.
What letter represents melting?
a)
A
b)
B
c)
C
d)
D
18.
What letter represents a gas being cooled?
a)
B
b)
C
c)
D
d)
E
19.
What letter represents a liquid being heated?
a)
A
b)
B
c)
C
d)
D
20.
Calculate the heat transferred when 440 g of water cools from 87.2°C to 50.0°C. (C = 4.18 J/g°C) (show your work)
a)
68000 J
b)
2.83 J
c)
-2.83 J
d)
-68000 J
21.
If 238 J of heat is absorbed by a sample of metal with a mass of 40.7 g, and it raises the temperature from 20.0°C to 32.4°C, what is the specific heat capacity of the metal? (show your work)
a)
2.34 J/g°C
b)
0.472 J/g°C
c)
6.13 J/g°C
d)
0.163 J/g°C
22.
What is kinetic energy?
a)
When an object is in motion
b)
When an object is not in motion
c)
all of the above
d)
none of the above
23.
What kind of energy is in a moving skateboard?
a)
Potential
b)
Kinetic
24.
What kind of energy is in a rock at the edge of a cliff?
a)
Potential
b)
Kinetic
25.
What kind of energy is in gasoline in a car tank (car is not on)?
a)
Potential
b)
Kinetic
26.
What kind of energy is in basketball passing through the hoop?
a)
Potential
b)
Kinetic
27.
Energy can not be created or destroyed, only converted from one form to another.
a)
true
b)
false
28.
One calorie equals __________ joules.
a)
0.4184
b)
4.184
c)
41.84
d)
418.4
29.
The law of conservation of energy states that energy is neither created nor destroyed.
a)
true
b)
false
30.
Potential energy is the energy of motion.
a)
true
b)
false
31.
__________________ is energy is motion.
a)
Potential energy
b)
Kinetic energy
32.
_____________ depends on the mass of the sample.
a)
temperature
b)
heat
33.
The symbol for heat is
a)
H
b)
T
c)
Q
34.
The unit for heat is
a)
°C
b)
J
35.
Which has a HIGHER specific heat capacity?
a)
A metal spoon
b)
A wooden spoon
36.
What symbol do we use for specific heat capacity?
a)
SHC
b)
S
c)
C
37.
The flat parts on a heating curve represent
a)
phase changes
b)
temperature changes
38.
Heat flows because of a difference in
a)
size
b)
temperature
39.
"∆" represents
a)
heat
b)
mass
c)
temperature
d)
change
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