Question 1

Which of the following is one of the two largest sources of electrical power in the United States?

Accepted Answer

A)  Coal 
B)  Nuclear power 
C)  Natural gas 
D)  Petroleum 
E)  Hydropower 
A)  Coal 
B)  Nuclear power 
C)  Natural gas 
D)  Petroleum 
E)  Hydropower

Question 2

Which of these statements is incorrect of heat ?

Accepted Answer

A)  Heat is essentially energy. 
B)  Entropy is another name for heat. 
C)  Heat involves random molecular and atomic motion. 
D)  Heat is measured in units of joules. 
E)  Heat involves the movement of energy from a warmer body to a cooler one. 
A)  Heat is essentially energy. 
B)  Entropy is another name for heat. 
C)  Heat involves random molecular and atomic motion. 
D)  Heat is measured in units of joules. 
E)  Heat involves the movement of energy from a warmer body to a cooler one.

Question 3

The amount of heat necessary to raise the temperature of a given amount of a substance by 1 ° C is known as _____.

Accepted Answer

A)  heat 
B)  energy 
C)  entropy 
D)  heat capacity 
E)  work 
A)  heat 
B)  energy 
C)  entropy 
D)  heat capacity 
E)  work

Question 4

Which of the following is/are an example/examples of an exothermic process?
I. Nuclear fission
II. The evaporation of alcohol
III. The burning of gasoline

Accepted Answer

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

Question 5

Which of the following fossil fuels contains the maximum amount of sulfur?

Accepted Answer

A)  Natural gas 
B)  Oil 
C)  Coal 
D)  They all contain about the same amount of sulfur. 
E)  None of them contain sulfur. 
A)  Natural gas 
B)  Oil 
C)  Coal 
D)  They all contain about the same amount of sulfur. 
E)  None of them contain sulfur.

Question 6

Which of the following is/are the correct unit(s) for measuring energy?
I. Joule
II. Quad
III. Kilowatt-hour
IV. Ampere

Accepted Answer

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

Question 7

A reaction that absorbs heat from the surroundings is known as a(n) _____.

Accepted Answer

A)  endothermic and combustion reaction 
B)  exothermic reaction 
C)  endothermic reaction 
D)  exothermic and combustion reaction 
E)  combustion reaction 
A)  endothermic and combustion reaction 
B)  exothermic reaction 
C)  endothermic reaction 
D)  exothermic and combustion reaction 
E)  combustion reaction

Question 8

Calculate the energy released in Calories if the burning of a nut produces 15,600 J of heat.

Accepted Answer

A)  3.73 Cal 
B)  15.6 Cal 
C)  65.2 Cal 
D)  269 Cal 
E)  3.7 × 103 Cal 
A)  3.73 Cal 
B)  15.6 Cal 
C)  65.2 Cal 
D)  269 Cal 
E)  3.7 × 103 Cal

Question 9

What is the name given to the plan to reduce international greenhouse gas emissions?

Accepted Answer

A)  Climate Action Plan 
B)  Climate Law 
C)  Kyoto Protocol 
D)  Gothenburg Protocol 
E)  None of these 
A)  Climate Action Plan 
B)  Climate Law 
C)  Kyoto Protocol 
D)  Gothenburg Protocol 
E)  None of these

Question 10

The energy associated with the position or composition of an object is known as _____.

Accepted Answer

A)  electric energy 
B)  mechanical energy 
C)  potential energy 
D)  magnetic energy 
E)  thermal energy 
A)  electric energy 
B)  mechanical energy 
C)  potential energy 
D)  magnetic energy 
E)  thermal energy

Question 11

Which of the following does not involve an increase in the random motion of a system?

Accepted Answer

A)  The burning of logs 
B)  The freezing of water 
C)  The exploding of bombs 
D)  Hot skillet 
E)  Helium escaping from a balloon 
A)  The burning of logs 
B)  The freezing of water 
C)  The exploding of bombs 
D)  Hot skillet 
E)  Helium escaping from a balloon

Question 12

What is the coefficient oxygen (O2) when the following equation is balanced?
​
_____ CH3OH + _____ O2 → _____ CO2 + _____ H2O

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  6 
A)  1 
B)  2 
C)  3 
D)  4 
E)  6

Question 13

What is the coefficient of O  2  when the following equation is balanced?
​
_____ C8H18 + _____ O2 → _____ CO2 + _____ H2O

Accepted Answer

A)  30 
B)  32 
C)  34 
D)  25 
E)  9 
A)  30 
B)  32 
C)  34 
D)  25 
E)  9

Question 14

Which of the following is the significant greenhouse gas with an approximate atmospheric composition of 0.04%?

Accepted Answer

A)  SO2 
B)  CO2 
C)  NO2 
D)  NO 
E)  O3 
A)  SO2 
B)  CO2 
C)  NO2 
D)  NO 
E)  O3

Question 15

Which of the following processes results in a net decrease in entropy?

Accepted Answer

A)  The evaporation of bromine 
B)  The freezing of ethyl alcohol 
C)  The combustion of natural gas 
D)  The explosion of ammonium nitrate 
E)  The dissolution of sodium chloride in pure water 
A)  The evaporation of bromine 
B)  The freezing of ethyl alcohol 
C)  The combustion of natural gas 
D)  The explosion of ammonium nitrate 
E)  The dissolution of sodium chloride in pure water

Question 16

Which of the following statements about fossil fuels is incorrect ?

Accepted Answer

A)  Fossil fuels are highly energetic. 
B)  Fossil fuels are primarily hydrocarbons. 
C)  The energy of fossil fuels is released by combustion reactions. 
D)  The energy within fossil fuels ultimately came from photosynthesis. 
E)  The energy within fossil fuels was formed as a result of exothermic reactions in prehistoric plants. 
A)  Fossil fuels are highly energetic. 
B)  Fossil fuels are primarily hydrocarbons. 
C)  The energy of fossil fuels is released by combustion reactions. 
D)  The energy within fossil fuels ultimately came from photosynthesis. 
E)  The energy within fossil fuels was formed as a result of exothermic reactions in prehistoric plants.

Question 17

Which of these statements about exothermic reactions is incorrect ?

Accepted Answer

A)  Exothermic reactions have a negative change in enthalpy. 
B)  Most combustion reactions are exothermic reactions. 
C)  Exothermic reactions release energy to the surroundings. 
D)  A chemical cold pack is an  example of an exothermic reaction. 
E)  All fuels exhibit exothermic properties. 
A)  Exothermic reactions have a negative change in enthalpy. 
B)  Most combustion reactions are exothermic reactions. 
C)  Exothermic reactions release energy to the surroundings. 
D)  A chemical cold pack is an  example of an exothermic reaction. 
E)  All fuels exhibit exothermic properties.

Question 18

Which of the following temperature conversions is correct?

Accepted Answer

A)  0 K = 273oC 
B)  0 K = − 273oC 
C)  0 K = 273oF 
D)  0 K = − 273oF 
E)  0 K = 0°C 
A)  0 K = 273oC 
B)  0 K = − 273oC 
C)  0 K = 273oF 
D)  0 K = − 273oF 
E)  0 K = 0°C

Question 19

Which of the following does not involve an increase in entropy?

Accepted Answer

A)  The burning of logs 
B)  The freezing water 
C)  Erosion 
D)  The melting of aluminum 
E)  The escaping of helium from a balloon 
A)  The burning of logs 
B)  The freezing water 
C)  Erosion 
D)  The melting of aluminum 
E)  The escaping of helium from a balloon

Question 20

Which of the following samples is capable of absorbing the highest amount of heat in 5 minutes?

Accepted Answer

A)  1 kg aluminum 
B)  1 kg water 
C)  1 kg iron 
D)  1 kg nickel 
E)  1 kg gold 
A)  1 kg aluminum 
B)  1 kg water 
C)  1 kg iron 
D)  1 kg nickel 
E)  1 kg gold

Which of the following is one of the two largest sources of electrical power in the United States?

Which of these statements is incorrect of heat ?

The amount of heat necessary to raise the temperature of a given amount of a substance by 1 ° C is known as _____.

Which of the following is/are an example/examples of an exothermic process? I. Nuclear fission II. The evaporation of alcohol III. The burning of gasoline

Which of the following fossil fuels contains the maximum amount of sulfur?

Which of the following is/are the correct unit(s) for measuring energy? I. Joule II. Quad III. Kilowatt-hour IV. Ampere

A reaction that absorbs heat from the surroundings is known as a(n) _____.

Calculate the energy released in Calories if the burning of a nut produces 15,600 J of heat.

What is the name given to the plan to reduce international greenhouse gas emissions?

The energy associated with the position or composition of an object is known as _____.

Which of the following does not involve an increase in the random motion of a system?

What is the coefficient oxygen (O₂) when the following equation is balanced? ___ CH₃OH + _ O₂ → _ CO₂ + ___ H₂O

What is the coefficient of O ₂ when the following equation is balanced? ___ C₈H₁₈ + _ O₂ → _ CO₂ + ___ H₂O

Which of the following is the significant greenhouse gas with an approximate atmospheric composition of 0.04%?

Which of the following processes results in a net decrease in entropy?

Which of the following statements about fossil fuels is incorrect ?

Which of these statements about exothermic reactions is incorrect ?

Which of the following temperature conversions is correct?

Which of the following does not involve an increase in entropy?

Which of the following samples is capable of absorbing the highest amount of heat in 5 minutes?

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Exam 9: Energy for Today

Which of the following is one of the two largest sources of electrical power in the United States?

Which of these statements is incorrect of heat ?

The amount of heat necessary to raise the temperature of a given amount of a substance by 1 ° C is known as _____.

Which of the following is/are an example/examples of an exothermic process? I. Nuclear fission II. The evaporation of alcohol III. The burning of gasoline

Which of the following fossil fuels contains the maximum amount of sulfur?

Which of the following is/are the correct unit(s) for measuring energy? I. Joule II. Quad III. Kilowatt-hour IV. Ampere

A reaction that absorbs heat from the surroundings is known as a(n) _____.

Calculate the energy released in Calories if the burning of a nut produces 15,600 J of heat.

What is the name given to the plan to reduce international greenhouse gas emissions?

The energy associated with the position or composition of an object is known as _____.

Which of the following does not involve an increase in the random motion of a system?

What is the coefficient oxygen (O2) when the following equation is balanced? ​ _____ CH3OH + _____ O2 → _____ CO2 + _____ H2O

What is the coefficient of O 2 when the following equation is balanced? ​ _____ C8H18 + _____ O2 → _____ CO2 + _____ H2O

Which of the following is the significant greenhouse gas with an approximate atmospheric composition of 0.04%?

Which of the following processes results in a net decrease in entropy?

Which of the following statements about fossil fuels is incorrect ?

Which of these statements about exothermic reactions is incorrect ?

Which of the following temperature conversions is correct?

Which of the following does not involve an increase in entropy?

Which of the following samples is capable of absorbing the highest amount of heat in 5 minutes?

Molecular Reasons

The Chemists Toolbox

Atoms and Elements

Molecules, Compounds, and Chemical Reactions

Chemical Bonding

Organic Chemistry

Light and Color

Nuclear Chemistry

Energy for Tomorrow: Solar and Other Renewable Energy Sources

The Air Around Us

The Liquids and Solids Around Us: Especially Water

Acids and Bases: the Molecules Responsible for Sour and Bitter

Oxidation and Reduction

The Chemistry of Household Products

Biochemistry and Biotechnology

Drugs and Medicine: Healing, Helping, and Hurting

The Chemistry of Food

Nanotechnology Online Only

Filters

What is the coefficient oxygen (O₂) when the following equation is balanced? ___ CH₃OH + _ O₂ → _ CO₂ + ___ H₂O

What is the coefficient of O ₂ when the following equation is balanced? ___ C₈H₁₈ + _ O₂ → _ CO₂ + ___ H₂O