Question 1

What physical change occurs at the melting point of a material?

Accepted Answer

A) Liquid becomes gas. 
B) Solid becomes liquid. 
C) Liquid becomes solid. 
D) Solid becomes gas. 
A) Liquid becomes gas. 
B) Solid becomes liquid. 
C) Liquid becomes solid. 
D) Solid becomes gas.

Question 2

What is a fire?

Accepted Answer

A self-sustaining ch

Question 3

What is the mass of a piece of copper that starts at 90°C, is immersed in a calorimeter with 500 g of water at 22.0°C, and causes the water to rise to a temperature of 27.5°C?

Accepted Answer

A) 1,150.6 g 
B) 302.8 g 
C) 184.1 g 
D) 484.5 g 
A) 1,150.6 g 
B) 302.8 g 
C) 184.1 g 
D) 484.5 g

Question 4

What is a combustible liquid?

Accepted Answer

One that must reach

Question 5

How does water interrupt the "fire triangle"?

Accepted Answer

A) It removes the ignition sources. 
B) It takes oxygen away from the fire. 
C) It quenches the fuel in the system. 
D) It removes heat from the system. 
A) It removes the ignition sources. 
B) It takes oxygen away from the fire. 
C) It quenches the fuel in the system. 
D) It removes heat from the system.

Question 6

Which is the balanced equation for the complete combustion of ethane gas (C2H6) in oxygen gas?

Accepted Answer

A) 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O 
B) 2 C2H6 + 4 O2 → 4 CO2 + 6 H2O 
C) 2 C2H6 + 7 O2 → 4 CO2 + 3 H2O 
D) 2 C2H6 + 7 O2 → 2 CO2 + 6 H2O 
A) 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O 
B) 2 C2H6 + 4 O2 → 4 CO2 + 6 H2O 
C) 2 C2H6 + 7 O2 → 4 CO2 + 3 H2O 
D) 2 C2H6 + 7 O2 → 2 CO2 + 6 H2O

Question 7

In an exothermic reaction energy diagram, what is the relationship between the reactants' and the products' energies?

Accepted Answer

A) The products are higher than the reactants. 
B) The reactants are higher than the products. 
C) Both reactants and products are the same energy. 
D) The reactants are always higher than the activation energy. 
A) The products are higher than the reactants. 
B) The reactants are higher than the products. 
C) Both reactants and products are the same energy. 
D) The reactants are always higher than the activation energy.

Question 8

What fraction of crude oil refinement is the gasoline fraction?

Accepted Answer

A) C1 to C4 
B) C5 to C10 
C) C10 to C16 
D) C14 to C20 
A) C1 to C4 
B) C5 to C10 
C) C10 to C16 
D) C14 to C20

Question 9

When a 213.0 g sample of aluminum is raised in temperature from 22.0ºC to 95.0ºC, what amount of heat is produced?

Accepted Answer

A) 13,994 J 
B) 18,211 J 
C) 4,217 J 
D) 15,549 J 
A) 13,994 J 
B) 18,211 J 
C) 4,217 J 
D) 15,549 J

Question 10

What do the specific heats of materials like copper, aluminum, and concrete all have in common?

Accepted Answer

A) They span from low to high. 
B) They are all very high. 
C) They are all very low. 
D) They have nothing in common. 
A) They span from low to high. 
B) They are all very high. 
C) They are all very low. 
D) They have nothing in common.

Question 11

What term is used to denote the energy required to start a chemical reaction?

Accepted Answer

A) The start-up energy 
B) The activation energy 
C) The threshold energy 
D) The combustion energy 
A) The start-up energy 
B) The activation energy 
C) The threshold energy 
D) The combustion energy

Question 12

What is the boiling point range of kerosene components?

Accepted Answer

A) 100°C-250°C 
B) 150°C-250°C 
C) 175°C-270°C 
D) 200°C-300°C 
A) 100°C-250°C 
B) 150°C-250°C 
C) 175°C-270°C 
D) 200°C-300°C

Question 13

The complete combustion of methane gas (CH4) in oxygen gas is what?

Accepted Answer

A) CH4 + 2 O2 → CO2 + 2 H2O 
B) 2 CH4 + 2 O2 → 2 CO2 + 2 H2O 
C) CH4 + 2 O2 → 2 CO2 + 2 H2O 
D) 2 CH4 + 2 O2 → CO2 + 2 H2O 
A) CH4 + 2 O2 → CO2 + 2 H2O 
B) 2 CH4 + 2 O2 → 2 CO2 + 2 H2O 
C) CH4 + 2 O2 → 2 CO2 + 2 H2O 
D) 2 CH4 + 2 O2 → CO2 + 2 H2O

Question 14

Fire must have an oxygen source to continue combustion.

Accepted Answer

A) True 
 B)False

Question 15

What is a flashover?

Accepted Answer

The movement of heat from a sm

Question 16

Why are pooling marks near furniture not good evidence of an arson?

Accepted Answer

Because fo

Question 17

The amount of energy released by a chemical process is always equal to that absorbed by the system or surroundings. This is a statement of what phenomenon?

Accepted Answer

A) The first law of exothermic reactivity 
B) The law of conservation of moles 
C) The first law of molecular motion 
D) The law of conservation of energy 
A) The first law of exothermic reactivity 
B) The law of conservation of moles 
C) The first law of molecular motion 
D) The law of conservation of energy

Question 18

A material can reach a heat at which it can combust without a spark or flame. What term describes this?

Accepted Answer

A) The boiling point 
B) The melt-boil temperature 
C) Fahrenheit 451 
D) The auto-ignition temperature 
A) The boiling point 
B) The melt-boil temperature 
C) Fahrenheit 451 
D) The auto-ignition temperature

Question 19

To what does the term oxidation refer?

Accepted Answer

A) The gain of electrons 
B) The movement of electrons 
C) The loss of electrons 
D) The reduction of electrons 
A) The gain of electrons 
B) The movement of electrons 
C) The loss of electrons 
D) The reduction of electrons

Question 20

What does reduction represent?

Accepted Answer

The gain o

What physical change occurs at the melting point of a material?

What is a fire?

What is the mass of a piece of copper that starts at 90°C, is immersed in a calorimeter with 500 g of water at 22.0°C, and causes the water to rise to a temperature of 27.5°C?

What is a combustible liquid?

How does water interrupt the "fire triangle"?

Which is the balanced equation for the complete combustion of ethane gas (C₂H₆) in oxygen gas?

In an exothermic reaction energy diagram, what is the relationship between the reactants' and the products' energies?

What fraction of crude oil refinement is the gasoline fraction?

When a 213.0 g sample of aluminum is raised in temperature from 22.0ºC to 95.0ºC, what amount of heat is produced?

What do the specific heats of materials like copper, aluminum, and concrete all have in common?

What term is used to denote the energy required to start a chemical reaction?

What is the boiling point range of kerosene components?

The complete combustion of methane gas (CH₄) in oxygen gas is what?

Fire must have an oxygen source to continue combustion.

What is a flashover?

Why are pooling marks near furniture not good evidence of an arson?

The amount of energy released by a chemical process is always equal to that absorbed by the system or surroundings. This is a statement of what phenomenon?

A material can reach a heat at which it can combust without a spark or flame. What term describes this?

To what does the term oxidation refer?

What does reduction represent?

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

What physical change occurs at the melting point of a material?

What is a fire?

What is the mass of a piece of copper that starts at 90°C, is immersed in a calorimeter with 500 g of water at 22.0°C, and causes the water to rise to a temperature of 27.5°C?

What is a combustible liquid?

How does water interrupt the "fire triangle"?

Which is the balanced equation for the complete combustion of ethane gas (C2H6) in oxygen gas?

In an exothermic reaction energy diagram, what is the relationship between the reactants' and the products' energies?

What fraction of crude oil refinement is the gasoline fraction?

When a 213.0 g sample of aluminum is raised in temperature from 22.0ºC to 95.0ºC, what amount of heat is produced?

What do the specific heats of materials like copper, aluminum, and concrete all have in common?

What term is used to denote the energy required to start a chemical reaction?

What is the boiling point range of kerosene components?

The complete combustion of methane gas (CH4) in oxygen gas is what?

Fire must have an oxygen source to continue combustion.

What is a flashover?

Why are pooling marks near furniture not good evidence of an arson?

The amount of energy released by a chemical process is always equal to that absorbed by the system or surroundings. This is a statement of what phenomenon?

A material can reach a heat at which it can combust without a spark or flame. What term describes this?

To what does the term oxidation refer?

What does reduction represent?

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 ethane gas (C₂H₆) in oxygen gas?

The complete combustion of methane gas (CH₄) in oxygen gas is what?