Download Review for test, Chapter 9

Chapter 9
1. What ingredients are needed for
a fire?
a.
b.
c.
d.
100%
a fuel source
oxygen gas
heat
all of the above
0%
a.
0%
b.
0%
c.
d.
2. What is heat?
a. a mass form transferred from object to
object upon contact
b. an energy form transferred from object to
object upon contact
40%
c. a mass–energy transfer when hot and
cold objects come into contact
d. an energy form transferred from hot to
cold objects when they come in contact
with each other
8%
a.
b.
36%
16%
c.
d.
3. When two or more objects touch and reach
the same temperature, this condition is called
a.
b.
c.
d.
static equilibrium
thermal equilibrium
dynamic equilibrium
isotonic equilibrium
92%
8%
0%
a.
b.
c.
0%
d.
4. What is the SI unit of heat
energy?
a.
b.
c.
d.
the joule
the calorie
the coulomb
the oC
68%
16%
16%
0%
a.
b.
c.
d.
5. What is another term for a
smoke explosion?
a.
b.
c.
d.
a limiting thrust
a vapor blow
a back draft
a fire triangle
64%
20%
12%
4%
a.
b.
c.
d.
6. Why are some wood-based
smokes white and others black?
a. It depends on the completeness of
the burning.
b. It depends upon the water content
of the wood being burned.
c. It depends on the color of the wood
being burned.
d. It depends on the size of the wood
being burned.
60%
32%
8%
0%
a.
b.
c.
d.
7. The complete combustion of wood
has carbon dioxide as one of its
products.
a. True
b. False
80%
20%
a.
b.
8. Balancing a combustion equation should
be done in what elemental order?
a.
b.
c.
d.
C-H-O
H-O-C
O-H-C
C-O-H
96%
0%
a.
b.
0%
c.
4%
d.
9. Which is the balanced equation for the
complete combustion of ethanol (C2H5OH) in
oxygen gas?
a.
b.
c.
d.
C2H5OH + 3 O2
2 CO2 + 3 H2O
2 C2H5OH + 6 O2
4 CO2 + 6 H2O
2 C2H5OH + 7/2 O2
4 CO2 + 6 H2O
C2H5OH + 7 O2
4 CO2 + 6 H2O
56%
24%
20%
0%
a.
b.
c.
d.
10. Which is the balanced equation for the
complete combustion of methanol (CH3OH) in
oxygen gas?
a.
b.
c.
d.
2 CH3OH + O2
2 CH3OH + 3 O2
CH3OH + 3 O2
CH3OH + 3 O2
2 CO2 + 4 H2O
2 CO2 + 4 H2O
2 CO2 + 2 H2O
CO2 + 4 H2O
48%
24%
20%
8%
a.
b.
c.
d.
11. The complete combustion of
methane gas (CH4) in oxygen gas is
what?
a.
b.
c.
d.
CH4 + 2 O2
2 CH4 + 2 O2
CH4 + 2 O2
2 CH4 + 2 O2
CO2 + 2 H2O
2 CO2 + 2 H2O
2 CO2 + 2 H2O
CO2 + 2 H2O
84%
4%
a.
b.
8%
c.
4%
d.
12. Why is heat needed to initiate
combustion?
a. Energy is needed to start the
fuel–oxygen reaction.
b. Liquids and solids need to be
converted to vapors.
c. neither of the above
d. both of the above
48%
40%
12%
0%
a.
b.
c.
d.
13. What do all exothermic
reactions produce?
a.
b.
c.
d.
heat
light
smoke
fumes
96%
0%
a.
b.
0%
c.
4%
d.
14. In an exothermic reaction energy diagram,
what is the relationship between the reactants'
and the products' energies?
a. The products are higher than the
reactants.
b. The reactants are higher than the
products.
c. Both reactants and products are
the same energy.
d. The reactants are always higher
than the activation energy.
48%
28%
24%
0%
a.
b.
c.
d.
15. Endothermic processes always give
off heat at the completion of the
reaction.
a. True
b. False
72%
28%
a.
b.
16. What physical change occurs at
the melting point of a material?
a.
b.
c.
d.
liquid becomes gas
solid becomes liquid
liquid becomes solid
solid becomes gas
92%
4%
0%
a.
b.
c.
4%
d.
17. In the temperature vs. heat diagram
below what does a plateau represent?
a. an equilibrium
adjustment
b. the loss of heat
c. the addition of heat
d. a phase change
84%
8%
8%
0%
a.
b.
c.
d.
18. The amount of energy required to
convert a liquid to a gas is known as what?
a.
b.
c.
d.
the heat of conversion
the heat of vaporization
the heat of gasification
the heat of nebulization
88%
12%
0%
a.
0%
b.
c.
d.
19. What is the heat of fusion?
a. the heat needed to melt a solid
completely.
b. the heat required to join two
metals.
c. the heat needed to separate two
metals.
d. the heat required to melt a fuse.
64%
32%
4%
a.
b.
c.
0%
d.
20. What does the following graph
represent?
a. Exothermic reaction
b. Endothermic reaction
c. Erythrothermic
reaction
d. A lame roller coaster
ride
56%
24%
20%
0%
a.
b.
c.
d.
21. What does the following graph
represent?
a. Exothermic reaction
b. Endothermic reaction
c. Erythrothermic
reaction
d. A lame roller coaster
ride
88%
8%
0%
a.
b.
c.
4%
d.
22.How does a flashover spread?
a.
b.
c.
d.
across the ceiling of a room where a fire exists
through the ventilation system of a house
across the floor of a room where a fire exists
through other combustible material in a room
where a fire exists
80%
12%
8%
0%
a.
b.
c.
d.
In chemical reactions between substances, energy is either released or absorbed.
23. Read the statement given above. What type of
chemical reaction occurs when the product of a
reaction is colder than the reactants?
a.
b.
c.
d.
endothermic reaction
exothermic reaction
exergonic reaction
catalyzed reaction
100%
0%
a)
b)
0%
c)
0%
d)
In chemical reactions between substances, energy is either released or absorbed.
24. Study the statement given above. What type of
chemical reaction occurs when energy must be
provided for the reaction to take place?
a.
b.
c.
d.
endothermic reaction
exothermic reaction
exergonic reaction
catalyzed reaction
55%
45%
0%
a)
b)
c)
0%
d)
25.The graph below illustrates what type of
reaction?
a.
b.
c.
d.
endothermic
exothermic
exergonic
unable to determine from the
information given
100%
0%
a)
b)
0%
c)
0%
d)
26.Water cools from 4°C to –4°C.
During this time, what happens to
the motion of the molecules?
a.
b.
c.
d.
The motion of the molecules stops.
The motion of the molecules increases.
The motion of the molecules decreases.
The motion of the molecules remains
the same.
100%
0%
a)
0%
b)
0%
c)
d)
27.
a.
b.
c.
d.
-120 kJ
-40 kJ
+ 160 kJ
+ 40 kJ
100%
0%
a)
0%
b)
0%
c)
d)
28. Starting as a solid, then liquid, and then gas, a sample of a
substance is heated at a constant rate. The graph below shows
the changes in temperature of this sample. What is the melting
point of the sample and the total time required to completely
melt the sample after it has reached its melting point?
a.
b.
c.
d.
50oC and 3 min
50oC and 5 min
110oC and 4 min
110oC and 14 min
80%
15%
0%
a)
b)
c)
5%
d)
Conversions
• Know how to convert calories, Calories,
kilocalories, Joules, & kiloJoules!
Heat energy
• Know how to use the formulas:
• Heat energy = (mass)(heat of fusion)
• Heat energy = (mass)(heat of vaporization)