Question 1

Based on this reaction and its energy profile,  
CH4(g)+ 2O2(g)→ CO2(g)+ 2H2O(g)
The reaction

Accepted Answer

A) is exothermic. 
B) is endothermic. 
C) has a high activation energy. 
D) violates the first law of thermodynamics. 
A) is exothermic. 
B) is endothermic. 
C) has a high activation energy. 
D) violates the first law of thermodynamics.

Question 2

During petroleum refining,catalysts play an extremely important role during the

Accepted Answer

A) cracking and reforming processes. 
B) environmental cleanup of oil wells. 
C) extraction of the oil from the earth. 
D) physical separation of the various components of the petroleum. 
A) cracking and reforming processes. 
B) environmental cleanup of oil wells. 
C) extraction of the oil from the earth. 
D) physical separation of the various components of the petroleum.

Question 3

The diagram below shows a simplified version of a fractionating column used in the petroleum industry.  
The position marked ___ corresponds to the cracker where large molecules are broken into smaller molecules.

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 4

Consider these three compounds.  
Which are isomers?

Accepted Answer

A) I and II only 
B) I and III only 
C) II and III only 
D) I,II,and III 
A) I and II only 
B) I and III only 
C) II and III only 
D) I,II,and III

Question 5

In which example is the entropy of the initial state greater than the entropy of the final state?

Accepted Answer

A) A building collapses during an earthquake. 
B) A lump of sugar dissolves in a cup of warm water. 
C) Liquid water freezes into ice. 
D) Liquid water evaporates. 
A) A building collapses during an earthquake. 
B) A lump of sugar dissolves in a cup of warm water. 
C) Liquid water freezes into ice. 
D) Liquid water evaporates.

Question 6

The energy equivalent of a certain cheeseburger is approximately 525 Cal.Since 1 Cal is 4.184 kJ this corresponds to

Accepted Answer

A) 1.25 kJ. 
B) 125 kJ. 
C) 220 kJ. 
D) 2200 kJ. 
A) 1.25 kJ. 
B) 125 kJ. 
C) 220 kJ. 
D) 2200 kJ.

Question 7

Over the very long run,the energy source that has the greatest potential to meet humanity's needs is

Accepted Answer

A) coal. 
B) hydropower. 
C) renewable biomass. 
D) solar (the sun). 
A) coal. 
B) hydropower. 
C) renewable biomass. 
D) solar (the sun).

Question 8

A gasoline's octane rating is determined by

Accepted Answer

A) comparing its burning properties to those of pure isooctane,which has an octane rating of 100. 
B) comparing its burning properties to those of natural gas,which produces far fewer pollutants than gasoline normally does. 
C) comparing the deposits left on the engine cylinders by burning gasoline to the deposits left by burning diesel fuel. 
D) comparing the acceleration of a vehicle when burning gasoline to its acceleration when burning pure ethanol. 
A) comparing its burning properties to those of pure isooctane,which has an octane rating of 100. 
B) comparing its burning properties to those of natural gas,which produces far fewer pollutants than gasoline normally does. 
C) comparing the deposits left on the engine cylinders by burning gasoline to the deposits left by burning diesel fuel. 
D) comparing the acceleration of a vehicle when burning gasoline to its acceleration when burning pure ethanol.

Question 9

Which of the following has the highest boiling point?

Accepted Answer

A) Propane 
B) Octane 
C) Methane 
D) Butane 
A) Propane 
B) Octane 
C) Methane 
D) Butane

Question 10

Petroleum (crude oil)is a complex mixture of thousands of substances,the majority of which are

Accepted Answer

A) carbohydrates. 
B) hydrocarbons. 
C) natural gases. 
D) proteins. 
A) carbohydrates. 
B) hydrocarbons. 
C) natural gases. 
D) proteins.

Question 11

The property of matter that determines the direction of heat flow is the

Accepted Answer

A) mass. 
B) temperature. 
C) volume. 
D) density. 
A) mass. 
B) temperature. 
C) volume. 
D) density.

Question 12

Which is not a known advantage of natural gas over other fossil fuels?

Accepted Answer

A) It burns more completely than other fossil fuels. 
B) It burns more cleanly than other fossil fuels. 
C) It is far more abundant than any other fossil fuel. 
D) Sulfur dioxide is rarely produced by burning natural gas. 
A) It burns more completely than other fossil fuels. 
B) It burns more cleanly than other fossil fuels. 
C) It is far more abundant than any other fossil fuel. 
D) Sulfur dioxide is rarely produced by burning natural gas.

Question 13

Which of the following is a proper use for a calorimeter?

Accepted Answer

A) Measuring heat of combustion 
B) Measuring temperature of a mixture 
C) Measuring the amount of oxygen consumed in a combustion reaction 
D) Measuring entropy of a reaction 
A) Measuring heat of combustion 
B) Measuring temperature of a mixture 
C) Measuring the amount of oxygen consumed in a combustion reaction 
D) Measuring entropy of a reaction

Question 14

Which of the following in NOT a step in fractional distillation of crude oil?

Accepted Answer

A) The crude oil is pumped into a large vessel and heated. 
B) As the temperature increases,the compounds vaporize. 
C) Fractions are mixed with natural gas to enrich the hydrocarbon content. 
D) Once in the gas phase,compounds travel up the tall distillation or fractionation tower.The compounds with smaller molar masses travel higher;the compounds with larger molar masses travel shorter distances up the column 
A) The crude oil is pumped into a large vessel and heated. 
B) As the temperature increases,the compounds vaporize. 
C) Fractions are mixed with natural gas to enrich the hydrocarbon content. 
D) Once in the gas phase,compounds travel up the tall distillation or fractionation tower.The compounds with smaller molar masses travel higher;the compounds with larger molar masses travel shorter distances up the column

Question 15

Which of these statements about biodiesel is not true?

Accepted Answer

A) Biodiesel is made from renewable resources such as vegetable oils and animal fats. 
B) Biodiesel is non-toxic and biodegradable. 
C) Biodiesel can be used in diesel engines without major modifications. 
D) Biodiesel has been withdrawn from several states due to health concerns. 
A) Biodiesel is made from renewable resources such as vegetable oils and animal fats. 
B) Biodiesel is non-toxic and biodegradable. 
C) Biodiesel can be used in diesel engines without major modifications. 
D) Biodiesel has been withdrawn from several states due to health concerns.

Question 16

The heat of combustion of ethane,C2H6,is 1560 kJ/mol.What is the heat of combustion of ethane,in kJ per gram?

Accepted Answer

A) 51.9 kJ/g 
B) 195 kJ/g 
C) 4.69 × 104 kJ/g 
D) 9.39 × 1026 kJ/g 
A) 51.9 kJ/g 
B) 195 kJ/g 
C) 4.69 × 104 kJ/g 
D) 9.39 × 1026 kJ/g

Question 17

Why is the mileage a vehicle gets less when burning E85 than 100% gasoline?

Accepted Answer

A) It is not,they are the same. 
B) It is not,E85 gives better mileage per gallon burned. 
C) Ethanol has a lower heat of combustion. 
D) Ethanol has a higher heat of combustion. 
A) It is not,they are the same. 
B) It is not,E85 gives better mileage per gallon burned. 
C) Ethanol has a lower heat of combustion. 
D) Ethanol has a higher heat of combustion.

Question 18

The energy of motion is called _________ energy.

Accepted Answer

A) electrical 
B) mechanical 
C) potential 
D) kinetic 
A) electrical 
B) mechanical 
C) potential 
D) kinetic

Question 19

The measure of how much energy is dispersed in a given process is called the

Accepted Answer

A) entropy. 
B) activation energy. 
C) heat of combustion. 
D) potential energy. 
A) entropy. 
B) activation energy. 
C) heat of combustion. 
D) potential energy.

Question 20

According to the graph below,  
The net import of petroleum drastically decreased during the years

Accepted Answer

A) 1970 to 1977. 
B) 1973 to 1975. 
C) 1977 to 1982. 
D) 1985 to 1990. 
A) 1970 to 1977. 
B) 1973 to 1975. 
C) 1977 to 1982. 
D) 1985 to 1990.

Based on this reaction and its energy profile, CH₄(g)+ 2O₂(g)→ CO₂(g)+ 2H₂O(g) The reaction

During petroleum refining,catalysts play an extremely important role during the

Consider these three compounds. Which are isomers?

In which example is the entropy of the initial state greater than the entropy of the final state?

The energy equivalent of a certain cheeseburger is approximately 525 Cal.Since 1 Cal is 4.184 kJ this corresponds to

Over the very long run,the energy source that has the greatest potential to meet humanity's needs is

A gasoline's octane rating is determined by

Which of the following has the highest boiling point?

Petroleum (crude oil)is a complex mixture of thousands of substances,the majority of which are

The property of matter that determines the direction of heat flow is the

Which is not a known advantage of natural gas over other fossil fuels?

Which of the following is a proper use for a calorimeter?

Which of the following in NOT a step in fractional distillation of crude oil?

Which of these statements about biodiesel is not true?

The heat of combustion of ethane,C₂H₆,is 1560 kJ/mol.What is the heat of combustion of ethane,in kJ per gram?

Why is the mileage a vehicle gets less when burning E85 than 100% gasoline?

The energy of motion is called _________ energy.

The measure of how much energy is dispersed in a given process is called the

According to the graph below, The net import of petroleum drastically decreased during the years

The Air We Breathe

Protecting the Ozone Layer

The Chemistry of Global Climate Change

Water for Life

Neutralizing the Threat of Acid Rain

The Fires of Nuclear Fission

Energy From Electron Transfer

The World of Polymers and Plastics

Manipulating Molecules and Designing Drugs

Nutrition: Food for Thought

Genetic Engineering and the Molecules of Life

Filters

Exam 4: Energy From Combustion

Based on this reaction and its energy profile, CH4(g)+ 2O2(g)→ CO2(g)+ 2H2O(g) The reaction

During petroleum refining,catalysts play an extremely important role during the

The diagram below shows a simplified version of a fractionating column used in the petroleum industry. The position marked ___ corresponds to the cracker where large molecules are broken into smaller molecules.

Consider these three compounds. Which are isomers?

In which example is the entropy of the initial state greater than the entropy of the final state?

The energy equivalent of a certain cheeseburger is approximately 525 Cal.Since 1 Cal is 4.184 kJ this corresponds to

Over the very long run,the energy source that has the greatest potential to meet humanity's needs is

A gasoline's octane rating is determined by

Which of the following has the highest boiling point?

Petroleum (crude oil)is a complex mixture of thousands of substances,the majority of which are

The property of matter that determines the direction of heat flow is the

Which is not a known advantage of natural gas over other fossil fuels?

Which of the following is a proper use for a calorimeter?

Which of the following in NOT a step in fractional distillation of crude oil?

Which of these statements about biodiesel is not true?

The heat of combustion of ethane,C2H6,is 1560 kJ/mol.What is the heat of combustion of ethane,in kJ per gram?

Why is the mileage a vehicle gets less when burning E85 than 100% gasoline?

The energy of motion is called _________ energy.

The measure of how much energy is dispersed in a given process is called the

According to the graph below, The net import of petroleum drastically decreased during the years

The Air We Breathe

Protecting the Ozone Layer

The Chemistry of Global Climate Change

Water for Life

Neutralizing the Threat of Acid Rain

The Fires of Nuclear Fission

Energy From Electron Transfer

The World of Polymers and Plastics

Manipulating Molecules and Designing Drugs

Nutrition: Food for Thought

Genetic Engineering and the Molecules of Life

Filters

Based on this reaction and its energy profile, CH₄(g)+ 2O₂(g)→ CO₂(g)+ 2H₂O(g) The reaction

The heat of combustion of ethane,C₂H₆,is 1560 kJ/mol.What is the heat of combustion of ethane,in kJ per gram?