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Study Quiz 1

1
Calculate the energy change associated with breaking all of the bonds in ethanol, C2H5OH.

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A)1574 kJ
B)2772 kJ
C)2883 kJ
D)3239 kJ
2
Which equation represents cracking, the production of more useful molecular weight fractions from crude oil?
A)C16H34 + catalyst → C8H18 + C8H16
B)2 C2H6 + 7 O2 + catalyst → 4 CO2 + 6 H2O
C)C4H10 + C3H6 + catalyst → C7H16
D)CH2CH2 + H2O + catalyst → CH3CH2OH
3
Why don't modern fossil fuel power plants operate at or near 100% efficiency?
A)Although 100% efficiency is possible, it is too expensive to design the plant to operate at this level.
B)100% efficiency is impossible; Organized energy is always being transformed into random motion (such as heat) which limits efficiency.
C)Although 100% efficiency is possible, the Law of Conservation of Energy governs the conversion of energy from one form to another.
D)100% efficiency is impossible. One of the driving forces for any chemical reaction is the release of heat energy.
4
Which structure shows the same structural isomer as the isomer of pentane shown here? (All hydrogen atoms have been omitted for clarity.)

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A)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0073048763/232422/ch04_Image3.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (1.0K)</a>

B)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0073048763/232422/ch04_Image4.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (1.0K)</a>

C)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0073048763/232422/ch04_Image5.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (1.0K)</a>

D)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0073048763/232422/ch04_Image6.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (1.0K)</a>
5
Which arrow in the diagram represents the net energy change for this reaction?
A + B → C + D

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A)1
B)2
C)3
D)4
6
How much energy will be required to break the bonds in one mole of nitrogen gas, N2?
A)160 kJ
B)428 kJ
C)578 kJ
D)946 kJ
7
Which equation represents the complete combustion of a hydrocarbon?
A)2 C8H18(l) + 17 O2(g) ----> 16 CO (g) + 18 H2O (g) + heat
B)C2H4(g) + 3 O2(g) ----> 2 CO2(g) + 2 H2O (g) + heat
C)C6H12O6(s) ----> 2 C2H5OH (l) + 2 CO2(g) + heat
D)C2H4(g) + H2(g) ----> C2H6(g) + heat
8
Petroleum gas, hydrocarbons with one to four carbon atoms, will be most likely collected at which location in this distillation column?

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A)A
B)B
C)C
D)D
9
More than 60% of the oil used in the U.S. is
A)from domestic production.
B)imported.
C)from the Alaskan North Slope.
D)from other sources, such as natural gas liquids.
10
The Law of Conservation of Energy (energy is neither created nor destroyed in a chemical reaction) is also known as the
A)First Law of Thermodynamics.
B)Second Law of Thermodynamics.
C)Third Law of Thermodynamics.
D)driving force for a chemical reaction.
11
One serving of a snack labeled as providing 150 Cal per serving provides _______ kJ?
A)36
B)150
C)280
D)630
12
Fossil fuels
A)are produced by large farming operations, such as growing soybeans or corn. They are renewable resources.
B)are carbon-containing skeletons from animals that decayed under high pressures and temperatures. They are nonrenewable resources.
C)are gaseous carbon-based fuels such as carbon monoxide, natural gas, and carbon dioxide. They are renewable resources.
D)originated as plant or animal matter 150-300 million years ago. They are nonrenewable resources.
13
Bond formation always _______ energy; it is an ________ process.
A)requires, exothermic
B)requires, endothermic
C)releases, endothermic
D)releases, exothermic
14
Which graph shows an exothermic reaction with curve A being the catalyzed reaction and curve B being the uncatalyzed reaction?
A)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0073048763/232422/ch04_Image9.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (5.0K)</a>
B)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0073048763/232422/ch04_Image10.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (5.0K)</a>
C)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0073048763/232422/ch04_Image11.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (4.0K)</a>
D)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0073048763/232422/ch04_Image12.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (4.0K)</a>
15
Which is not a fossil fuel?
A)coal
B)petroleum
C)uranium
D)natural gas
16
The energy that flows from a warmer object to a cooler object is called
A)heat.
B)temperature.
C)potential energy.
D)entropy.
17
As of 2008, the major end use of crude oil in the U.S. is
A)making plastics.
B)home heating oil.
C)jet fuel.
D)gasoline.
18
Compared to gasoline made from pure hydrocarbons, oxygenated gasoline has a ______ octane rating, results in ___________ complete combustion, and releases ______ energy per gram?
A)higher, more, more
B)higher, less, less
C)higher, more, less
D)lower, less, more
19
The heat energy absorbed or released by a chemical reaction is determined by the difference between the energy __________ to break the bonds in the reactants and the energy ________ upon making the bonds in the products.
A)required, released
B)required, required
C)released, released
D)released, required
20
"Peak oil" refers to
A)the maximum consumption of crude oil.
B)the highest quality crude oil.
C)the time of maximum production of crude oil.
D)any crude oil recovered from mountains.





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