Question 1

Which of the following compounds would you expect to have the highest octane rating?

Accepted Answer

A)   pentane, C5H12 , CH3CH2CH2CH2CH3
B)   hexane, C6H14 , CH3CH2CH2CH2CH2CH3
C)   isooctane, C8H18 , (CH3)  3CCH2CH(CH3)  2
D)   heptane, C7H16 , CH3CH2CH2CH2CH2CH2CH3E) All of the above
F) C) and D)

Question 2

At current usage rates, world reserves of which fuel below are estimated to last for the least number of years?

Accepted Answer

A)   natural gas
B)   hydrogen
C)   petroleum
D)   coalE) B) and D)
F) A) and B)

Question 3

Fermentation of carbohydrates is a source of

Accepted Answer

A)   MTBE.
B)   ethanol.
C)   ethers.
D)   methanol.E) B) and C)
F) C) and D)

Question 4

The complete combustion of C2H6 yields

Accepted Answer

A)   C2H4 and H2.
B)   CO and H2O.
C)   CO2 and H2O.
D)   C and H2.E) B) and C)
F) A) and B)

Question 5

The hydrocarbon represented by the following model would be called

Accepted Answer

A)   unsaturated.
B)   aromatic.
C)   an alkene.
D)   all of the aboveE) A) and B)
F) C) and D)

Question 6

Which fossil fuel has a molecular structure containing cyclic hydrocarbons?

Accepted Answer

A)   coal
B)   liquid propane
C)   natural gas
D)   none of theseE) A) and C)
F) A) and B)

Question 7

The hydrocarbon model shown below could represent a saturated compound with the general formula CnH2n+2.

Accepted Answer

A) True 
 B)False

Question 8

Consider the following model of ethanol, CHS1U1B13S1U1B0CHS1U1B12S1U1B0OH.  During the complete combustion of ethanol with oxygen, carbon dioxide and water are formed.
-The number of carbon to hydrogen single bonds that are broken is_______.

Accepted Answer

The answer of Consider the following model of ethanol, CHS1U1B13S1U1B0CHS1U1B12S1U1B0OH....

Question 9

Which of the following is not true about benzene?

Accepted Answer

A)   has the formula C6H12
B)   is a carcinogen
C)   increases the octane rating of gasoline
D)   is a cyclic hydrocarbonE) None of the above
F) B) and C)

Question 10

Consider the following model of ethanol, CHS1U1B13S1U1B0CHS1U1B12S1U1B0OH.  During the complete combustion of ethanol with oxygen, carbon dioxide and water are formed.
-Using the data in the following table,  The amount of energy released in the formation of all the O-H bonds in the product water is ______kJ.

Accepted Answer

2802
2802 kJ

Question 11

What term is used to describe the amount of heat energy released from burning?

Accepted Answer

A)   heat of fusion
B)   heat of vaporization
C)   heat of combustion
D)   heat of formationE) None of the above
F) All of the above

Question 12

Which process is used to increase the amount of the gasoline fraction in refining to match commercial demand?

Accepted Answer

A)   reforming
B)   oxygenating
C)   cracking
D)   gasificationE) None of the above
F) C) and D) D

Question 13

Which of the following is not true about the compound MTBE?

Accepted Answer

A)   it is an ether
B)   made by fermentation
C)   it is a carcinogen
D)   used to oxygenate gasolineE) All of the above
F) C) and D)

Question 14

Which hydrocarbon would be isolated at the top of a fractionation column?

Accepted Answer

A)   C5H12
B)   C10H22
C)   C3H8
D)   C18H36E) All of the above
F) B) and D)

Question 15

Consider the following model of ethanol, CHS1U1B13S1U1B0CHS1U1B12S1U1B0OH.  During the complete combustion of ethanol with oxygen, carbon dioxide and water are formed.
-In the balanced equation for the combustion of one mole of ethanol, the coefficient of water is _____.

Accepted Answer

The answer of Consider the following model of ethanol, CHS1U1B13S1U1B0CHS1U1B12S1U1B0OH....

Question 16

Fractional distillation of petroleum

Accepted Answer

A)   separates and purifies all of the hydrocarbons in crude oil.
B)   separates fractions, each of which contain many hydrocarbons.
C)   is the final step in refining gasoline.
D)   fractions large molecules into smaller ones.E) C) and D)
F) A) and B)

Question 17

Butane [CH3CH2CH2CH3] and 2-methylpropane [(CH3) 2CHCH3] are

Accepted Answer

A)   stereoisomers.
B)   cis-trans isomers.
C)   structural isomers.
D)   optical isomers.E) B) and D)
F) None of the above

Question 18

The fuel identified as M85 is

Accepted Answer

A)   a substance with a molar mass of 85.
B)   a fuel mixture of 85% methanol and 15% gasoline.
C)   a fuel with a boiling point above 85 ∘\circ∘ C.
D)   a fuel that is 85% gasoline and 15% ethanol. E) None of the above
F) A) and D) B

Question 19

Which fossil fuel furnishes the most heat energy per gram?

Accepted Answer

A)   petroleum
B)   charcoal
C)   natural gas
D)   coalE) A) and D)
F) B) and C)

Question 20

A coal gasification process involving a catalyst, carbon monoxide, hydrogen, steam and coal produces

Accepted Answer

A)   only CO.
B)   liquid petroleum.
C)   octane.
D)   methane and carbon dioxide.E) None of the above
F) B) and C)

Exam 12: Energy and Hydrocarbons

Which of the following compounds would you expect to have the highest octane rating?

Correct AnswerverifiedShow Answer

At current usage rates, world reserves of which fuel below are estimated to last for the least number of years?

Correct AnswerverifiedShow Answer

Fermentation of carbohydrates is a source of

Correct AnswerverifiedShow Answer

The complete combustion of C2H6 yields

Correct AnswerverifiedShow Answer

The hydrocarbon represented by the following model would be called

Correct AnswerverifiedShow Answer

Which fossil fuel has a molecular structure containing cyclic hydrocarbons?

Correct AnswerverifiedShow Answer

The hydrocarbon model shown below could represent a saturated compound with the general formula CnH2n+2.

Correct AnswerverifiedShow Answer

Consider the following model of ethanol, CH3CH2OH. During the complete combustion of ethanol with oxygen, carbon dioxide and water are formed. -The number of carbon to hydrogen single bonds that are broken is_______.

Correct AnswerverifiedShow Answer

Which of the following is not true about benzene?

Correct AnswerverifiedShow Answer

Consider the following model of ethanol, CH3CH2OH. During the complete combustion of ethanol with oxygen, carbon dioxide and water are formed. -Using the data in the following table, The amount of energy released in the formation of all the O-H bonds in the product water is ______kJ.

Correct Answerverified2802 2802 kJ

What term is used to describe the amount of heat energy released from burning?

Correct AnswerverifiedShow Answer

Which process is used to increase the amount of the gasoline fraction in refining to match commercial demand?

Correct AnswerverifiedD

Which of the following is not true about the compound MTBE?

Correct AnswerverifiedShow Answer

Which hydrocarbon would be isolated at the top of a fractionation column?

Correct AnswerverifiedShow Answer

Consider the following model of ethanol, CH3CH2OH. During the complete combustion of ethanol with oxygen, carbon dioxide and water are formed. -In the balanced equation for the combustion of one mole of ethanol, the coefficient of water is _____.

Correct AnswerverifiedShow Answer

Fractional distillation of petroleum

Correct AnswerverifiedShow Answer

Butane [CH3CH2CH2CH3] and 2-methylpropane [(CH3) 2CHCH3] are

Correct AnswerverifiedShow Answer

The fuel identified as M85 is

Correct AnswerverifiedB

Which fossil fuel furnishes the most heat energy per gram?

Correct AnswerverifiedShow Answer

A coal gasification process involving a catalyst, carbon monoxide, hydrogen, steam and coal produces

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The complete combustion of C₂H₆ yields

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The hydrocarbon model shown below could represent a saturated compound with the general formula C_nH_2n+2.

Correct Answer
verified

Consider the following model of ethanol, CH₃CH₂OH. During the complete combustion of ethanol with oxygen, carbon dioxide and water are formed. -The number of carbon to hydrogen single bonds that are broken is_______.

Correct Answer
verified

Correct Answer
verified

Consider the following model of ethanol, CH₃CH₂OH. During the complete combustion of ethanol with oxygen, carbon dioxide and water are formed. -Using the data in the following table, The amount of energy released in the formation of all the O-H bonds in the product water is ______kJ.

Correct Answer
verified
2802 2802 kJ

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
verified

Correct Answer
verified

Consider the following model of ethanol, CH₃CH₂OH. During the complete combustion of ethanol with oxygen, carbon dioxide and water are formed. -In the balanced equation for the combustion of one mole of ethanol, the coefficient of water is _____.

Correct Answer
verified

Correct Answer
verified

Butane [CH₃CH₂CH₂CH₃] and 2-methylpropane [(CH₃) ₂CHCH₃] are

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified