Question 1

An atom that has gone from an oxidation state of -2 to -1 in a reaction has undergone what process?

Accepted Answer

A) It has oxidized. 
B) It has reduced. 
C) It has become more acidic. 
D) It has become more basic. 
A) It has oxidized. 
B) It has reduced. 
C) It has become more acidic. 
D) It has become more basic. A

Question 2

Which is the balanced equation for the complete combustion of ethanol (C2H5OH) in oxygen gas?

Accepted Answer

A) C2H5OH + 7 O2 → 2 CO2 + 3 H2O 
B) 2 C2H5OH + 7 O2 → 4 CO2 + 6 H2O 
C) 2 C2H5OH + 7/2 O2 → 4 CO2 + 6 H2O 
D) C2H5OH + 7 O2 → 4 CO2 + 6 H2O 
A) C2H5OH + 7 O2 → 2 CO2 + 3 H2O 
B) 2 C2H5OH + 7 O2 → 4 CO2 + 6 H2O 
C) 2 C2H5OH + 7/2 O2 → 4 CO2 + 6 H2O 
D) C2H5OH + 7 O2 → 4 CO2 + 6 H2O B

Question 3

Vaporization of a liquid fuel to a gas that can combust is what category of reaction?

Accepted Answer

A) Hypothermic 
B) Exothermic 
C) Endothermic 
D) Not enough information to tell 
A) Hypothermic 
B) Exothermic 
C) Endothermic 
D) Not enough information to tell C

Question 4

What typically happens to non-metal free elements (like oxygen or nitrogen) when they react in a redox reaction?

Accepted Answer

A) They are oxidized. 
B) They are reduced. 
C) They are neither oxidized nor reduced. 
D) They combust. 
A) They are oxidized. 
B) They are reduced. 
C) They are neither oxidized nor reduced. 
D) They combust.

Question 5

All exothermic reactions have a final energy of their products that is lower than the energy of the reactants.

Accepted Answer

A) True 
 B)False

Question 6

What happens to the number of electrons in an element when it is oxidized?

Accepted Answer

A) It increases. 
B) It decreases. 
C) It stays the same. 
D) It increases only in acidic solution. 
A) It increases. 
B) It decreases. 
C) It stays the same. 
D) It increases only in acidic solution.

Question 7

According to the law of conservation of energy, heat lost, qlost, is equal to what?

Accepted Answer

Question 8

Balancing a combustion equation should be done in what elemental order?

Accepted Answer

A) C-H-O 
B) H-O-C 
C) O-H-C 
D) C-O-H 
A) C-H-O 
B) H-O-C 
C) O-H-C 
D) C-O-H

Question 9

What is a fire triangle?

Accepted Answer

A fuel sou

Question 10

How is the combustion of propane, C3H8, in oxygen, best represented in a balanced chemical equation?

Accepted Answer

C₃H₈ + 5 O₂ F

Question 11

What is the condition called when two or more objects touch and reach the same temperature?

Accepted Answer

A) Static equilibrium 
B) Thermal equilibrium 
C) Dynamic equilibrium 
D) Isotonic equilibrium 
A) Static equilibrium 
B) Thermal equilibrium 
C) Dynamic equilibrium 
D) Isotonic equilibrium

Question 12

The amount of energy required to convert a liquid to a gas is known as what?

Accepted Answer

A) The heat of conversion 
B) The heat of vaporization 
C) The heat of gasification 
D) The heat of nebulization 
A) The heat of conversion 
B) The heat of vaporization 
C) The heat of gasification 
D) The heat of nebulization

Question 13

What is the mass of a piece of aluminum that starts at 100°C, is immersed in a calorimeter with 200 g of water at 25.0°C, and causes the water to rise to a temperature of 29.5°C?

Accepted Answer

A) 200.0 g 
B) 53.4 g 
C) 59.3 g 
D) 4,184.0 g 
A) 200.0 g 
B) 53.4 g 
C) 59.3 g 
D) 4,184.0 g

Question 14

In an unbalanced chemical equation in which the following occurs: Fe2O3 → FeO, what has happened to the iron in the reaction?

Accepted Answer

A) It has been oxidized. 
B) It has been reduced. 
C) It has become acidic. 
D) It has become basic. 
A) It has been oxidized. 
B) It has been reduced. 
C) It has become acidic. 
D) It has become basic.

Question 15

The C5 to C9 fraction of crude oil refining is what?

Accepted Answer

A) Diesel fuel 
B) Kerosene and jet fuel 
C) Gasoline 
D) Industrial chemicals 
A) Diesel fuel 
B) Kerosene and jet fuel 
C) Gasoline 
D) Industrial chemicals

Question 16

What intermolecular forces account for the much higher specific heat capacity of water than of metals?

Accepted Answer

A) Permanent dipoles 
B) Hydrogen bonding 
C) Both of the above 
D) None of the above 
A) Permanent dipoles 
B) Hydrogen bonding 
C) Both of the above 
D) None of the above

Question 17

According to a phase graph such as that in Worked Example 9, what happens to the temperature of water from the time the first drop of liquid forms from ice to the time the last bit of ice melts?

Accepted Answer

A) It continues to rise slowly. 
B) It stays the same. 
C) It actually decreases slowly. 
D) There is not enough information on the graph to tell. 
A) It continues to rise slowly. 
B) It stays the same. 
C) It actually decreases slowly. 
D) There is not enough information on the graph to tell.

Question 18

The balanced equation for the complete combustion of methanol (CH3OH) in oxygen gas is what?

Accepted Answer

A) 2 CH3OH + O2 → 2 CO2 + 4 H2O 
B) 2 CH3OH + 3 O2 → 2 CO2 + 4 H2O 
C) CH3OH + 3 O2 → 2 CO2 + 2 H2O 
D) CH3OH + 3 O2 → CO2 + 4 H2O 
A) 2 CH3OH + O2 → 2 CO2 + 4 H2O 
B) 2 CH3OH + 3 O2 → 2 CO2 + 4 H2O 
C) CH3OH + 3 O2 → 2 CO2 + 2 H2O 
D) CH3OH + 3 O2 → CO2 + 4 H2O

Question 19

What is the correct definition of temperature?

Accepted Answer

A measure of the ave

Question 20

All combustion reactions involve what reactants?

Accepted Answer

A) Metals and oxygen 
B) Organic compounds and oxygen 
C) Organic compounds and ignitors 
D) Oxygen and species of wood 
A) Metals and oxygen 
B) Organic compounds and oxygen 
C) Organic compounds and ignitors 
D) Oxygen and species of wood

An atom that has gone from an oxidation state of -2 to -1 in a reaction has undergone what process?

Which is the balanced equation for the complete combustion of ethanol (C₂H₅OH) in oxygen gas?

Vaporization of a liquid fuel to a gas that can combust is what category of reaction?

What typically happens to non-metal free elements (like oxygen or nitrogen) when they react in a redox reaction?

All exothermic reactions have a final energy of their products that is lower than the energy of the reactants.

What happens to the number of electrons in an element when it is oxidized?

According to the law of conservation of energy, heat lost, q_lost, is equal to what?

Balancing a combustion equation should be done in what elemental order?

What is a fire triangle?

How is the combustion of propane, C₃H₈, in oxygen, best represented in a balanced chemical equation?

What is the condition called when two or more objects touch and reach the same temperature?

The amount of energy required to convert a liquid to a gas is known as what?

What is the mass of a piece of aluminum that starts at 100°C, is immersed in a calorimeter with 200 g of water at 25.0°C, and causes the water to rise to a temperature of 29.5°C?

In an unbalanced chemical equation in which the following occurs: Fe₂O₃ → FeO, what has happened to the iron in the reaction?

The C5 to C9 fraction of crude oil refining is what?

What intermolecular forces account for the much higher specific heat capacity of water than of metals?

According to a phase graph such as that in Worked Example 9, what happens to the temperature of water from the time the first drop of liquid forms from ice to the time the last bit of ice melts?

The balanced equation for the complete combustion of methanol (CH₃OH) in oxygen gas is what?

What is the correct definition of temperature?

All combustion reactions involve what reactants?

Understanding Our World With Chemistry

Matter: Properties, Changes and Measurements

Understanding Atoms

Bonding and Reactions

Chemistry of Bonding: Structure and Function of Drug Molecules

Aqueous Solutions: Part I

Aqueous Solutions: Part II

Organic Chemistry and Polymers

Chemistry of Explosions

Applications of Chemical Kinetics

Nuclear Chemistry: Energy, Medicine, Weapons, and Terrorism

Chemical Equilibrium

Introduction to Biochemistry

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Exam 9: Chemistry of Fire and Heat

An atom that has gone from an oxidation state of -2 to -1 in a reaction has undergone what process?

Which is the balanced equation for the complete combustion of ethanol (C2H5OH) in oxygen gas?

Vaporization of a liquid fuel to a gas that can combust is what category of reaction?

What typically happens to non-metal free elements (like oxygen or nitrogen) when they react in a redox reaction?

All exothermic reactions have a final energy of their products that is lower than the energy of the reactants.

What happens to the number of electrons in an element when it is oxidized?

According to the law of conservation of energy, heat lost, qlost, is equal to what?

Balancing a combustion equation should be done in what elemental order?

What is a fire triangle?

How is the combustion of propane, C3H8, in oxygen, best represented in a balanced chemical equation?

What is the condition called when two or more objects touch and reach the same temperature?

The amount of energy required to convert a liquid to a gas is known as what?

What is the mass of a piece of aluminum that starts at 100°C, is immersed in a calorimeter with 200 g of water at 25.0°C, and causes the water to rise to a temperature of 29.5°C?

In an unbalanced chemical equation in which the following occurs: Fe2O3 → FeO, what has happened to the iron in the reaction?

The C5 to C9 fraction of crude oil refining is what?

What intermolecular forces account for the much higher specific heat capacity of water than of metals?

According to a phase graph such as that in Worked Example 9, what happens to the temperature of water from the time the first drop of liquid forms from ice to the time the last bit of ice melts?

The balanced equation for the complete combustion of methanol (CH3OH) in oxygen gas is what?

What is the correct definition of temperature?

All combustion reactions involve what reactants?

Understanding Our World With Chemistry

Matter: Properties, Changes and Measurements

Understanding Atoms

Bonding and Reactions

Chemistry of Bonding: Structure and Function of Drug Molecules

Aqueous Solutions: Part I

Aqueous Solutions: Part II

Organic Chemistry and Polymers

Chemistry of Explosions

Applications of Chemical Kinetics

Nuclear Chemistry: Energy, Medicine, Weapons, and Terrorism

Chemical Equilibrium

Introduction to Biochemistry

Filters

Which is the balanced equation for the complete combustion of ethanol (C₂H₅OH) in oxygen gas?

According to the law of conservation of energy, heat lost, q_lost, is equal to what?

How is the combustion of propane, C₃H₈, in oxygen, best represented in a balanced chemical equation?

In an unbalanced chemical equation in which the following occurs: Fe₂O₃ → FeO, what has happened to the iron in the reaction?

The balanced equation for the complete combustion of methanol (CH₃OH) in oxygen gas is what?