Question 1

How many joules of heat are produced from the burning of methane releasing 125 kJ heat?

Accepted Answer

A) 0.125 J 
B) 1.25 J 
C) 12.5 J 
D) 125 J 
E) 125,000 J 
A) 0.125 J 
B) 1.25 J 
C) 12.5 J 
D) 125 J 
E) 125,000 J

Question 2

A force which acts through a distance is known as ____.

Accepted Answer

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

Question 3

Which of these does not involve a decrease in the random motion of a system?

Accepted Answer

A) Burning log 
B) Freezing methanol 
C) Filtering sugar from tea 
D) Condensing water 
E) Refrigeration  of water 
A) Burning log 
B) Freezing methanol 
C) Filtering sugar from tea 
D) Condensing water 
E) Refrigeration  of water

Question 4

Which of these units is used for reporting the amount of energy consumed by a nation?

Accepted Answer

A) Watt 
B) Calorie 
C) Quad 
D) calorie 
E) Joule 
A) Watt 
B) Calorie 
C) Quad 
D) calorie 
E) Joule

Question 5

The freezing point of methane is − 295 ° F and the boiling point is − 263 ° F. The temperature of the surface of Titan, a moon of Saturn, is 93 K. If methane exists on Titan, it is

Accepted Answer

A) a gas. 
B) a solid. 
C) a liquid. 
D) a plasma. 
E) none of these. 
A) a gas. 
B) a solid. 
C) a liquid. 
D) a plasma. 
E) none of these.

Question 6

Which of these is an example of an endothermic system?
I. A cold pack
II. Evaporation of alcohol
III. 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 7

Which of these units of energy is typically used for nutritional measurements?

Accepted Answer

A) Quad 
B) Calorie 
C) Watt 
D) calorie 
E) Joule 
A) Quad 
B) Calorie 
C) Watt 
D) calorie 
E) Joule

Question 8

Which of these statements is incorrect of exothermic reactions?

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 cold pack is a good 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 cold pack is a good example of an exothermic reaction. 
E) All fuels exhibit exothermic properties.

Question 9

Which of these does not involve an increase in entropy?

Accepted Answer

A) Burning log 
B) Freezing water 
C) Erosion 
D) Melting aluminum 
E) Helium escaping from a balloon 
A) Burning log 
B) Freezing water 
C) Erosion 
D) Melting aluminum 
E) Helium escaping from a balloon

Question 10

How many kJ of heat are released when 54.9 grams of manganese is burned forming Mn3O4(s). The Δ H for the reaction is − 25.3 kJ\g.

Accepted Answer

A) 2.17 kJ 
B) 54.9 kJ 
C) 462 kJ 
D) 924 kJ 
E) 1389 kJ 
A) 2.17 kJ 
B) 54.9 kJ 
C) 462 kJ 
D) 924 kJ 
E) 1389 kJ

Question 11

Which of the following does not add carbon dioxide to the atmosphere?

Accepted Answer

A) forest fires 
B) breathing 
C) photosynthesis 
D) driving a car 
A) forest fires 
B) breathing 
C) photosynthesis 
D) driving a car

Question 12

Which of these is important in the formation of acid rain?

Accepted Answer

A) SO2 
B) H2O 
C) NO2 
D) NO 
E) All of the above 
A) SO2 
B) H2O 
C) NO2 
D) NO 
E) All of the above

Question 13

Which of these compounds can bind to hemoglobin in place of oxygen, causing the heart and respiratory systems to work harder?

Accepted Answer

A) CO 
B) CO2 
C) NO 
D) NO2 
E) H2O 
A) CO 
B) CO2 
C) NO 
D) NO2 
E) H2O

Question 14

Which of these is the single largest source of electrical power in the United States?

Accepted Answer

A) coal 
B) nuclear 
C) natural gas 
D) petroleum 
E) hydropower 
A) coal 
B) nuclear 
C) natural gas 
D) petroleum 
E) hydropower

Question 15

How many kilowatt-hours is generated when burning 2.5 g of methane produces 125 kJ of heat?

Accepted Answer

A) 3.5 × 102 kWh 
B) 3.5 × 10 − 1 kWh 
C) 3.5 × 10 − 2 kWh 
D) 3.5 × 10 − 3 kWh 
E) 3.5 × 10 − 4 kWh 
A) 3.5 × 102 kWh 
B) 3.5 × 10 − 1 kWh 
C) 3.5 × 10 − 2 kWh 
D) 3.5 × 10 − 3 kWh 
E) 3.5 × 10 − 4 kWh

Question 16

Which of these is the most significant greenhouse gas?

Accepted Answer

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

Question 17

Which of these involves a net increase in entropy?
I. Condensation of steam
II. Freezing of methanol
III. Evaporation of ethanol
IV. Extraction of salts from seawater

Accepted Answer

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

Question 18

A reaction which absorbs heat from the surroundings is known as a(n)____.

Accepted Answer

A) heat capacity 
B) exothermic reaction 
C) endothermic reaction 
D) enthalpy reaction 
E) combustion reaction 
A) heat capacity 
B) exothermic reaction 
C) endothermic reaction 
D) enthalpy reaction 
E) combustion reaction

Question 19

Which of these 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 of 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 of fossil fuels was formed as a result of exothermic reactions in prehistoric plants.

Question 20

The amount of heat necessary to change 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

How many joules of heat are produced from the burning of methane releasing 125 kJ heat?

A force which acts through a distance is known as ____.

Which of these does not involve a decrease in the random motion of a system?

Which of these units is used for reporting the amount of energy consumed by a nation?

The freezing point of methane is − 295 ° F and the boiling point is − 263 ° F. The temperature of the surface of Titan, a moon of Saturn, is 93 K. If methane exists on Titan, it is

Which of these is an example of an endothermic system? I. A cold pack II. Evaporation of alcohol III. Burning of gasoline

Which of these units of energy is typically used for nutritional measurements?

Which of these statements is incorrect of exothermic reactions?

Which of these does not involve an increase in entropy?

How many kJ of heat are released when 54.9 grams of manganese is burned forming Mn₃O₄(s). The Δ H for the reaction is − 25.3 kJ\g.

Which of the following does not add carbon dioxide to the atmosphere?

Which of these is important in the formation of acid rain?

Which of these compounds can bind to hemoglobin in place of oxygen, causing the heart and respiratory systems to work harder?

Which of these is the single largest source of electrical power in the United States?

How many kilowatt-hours is generated when burning 2.5 g of methane produces 125 kJ of heat?

Which of these is the most significant greenhouse gas?

Which of these involves a net increase in entropy? I. Condensation of steam II. Freezing of methanol III. Evaporation of ethanol IV. Extraction of salts from seawater

A reaction which absorbs heat from the surroundings is known as a(n)____.

Which of these statements about fossil fuels is incorrect ?

The amount of heat necessary to change a given amount of a substance by 1 ° C is known as ____.

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

Filters

Exam 9: Energy for Today

How many joules of heat are produced from the burning of methane releasing 125 kJ heat?

A force which acts through a distance is known as ____.

Which of these does not involve a decrease in the random motion of a system?

Which of these units is used for reporting the amount of energy consumed by a nation?

The freezing point of methane is − 295 ° F and the boiling point is − 263 ° F. The temperature of the surface of Titan, a moon of Saturn, is 93 K. If methane exists on Titan, it is

Which of these is an example of an endothermic system? I. A cold pack II. Evaporation of alcohol III. Burning of gasoline

Which of these units of energy is typically used for nutritional measurements?

Which of these statements is incorrect of exothermic reactions?

Which of these does not involve an increase in entropy?

How many kJ of heat are released when 54.9 grams of manganese is burned forming Mn3O4(s). The Δ H for the reaction is − 25.3 kJ\g.

Which of the following does not add carbon dioxide to the atmosphere?

Which of these is important in the formation of acid rain?

Which of these compounds can bind to hemoglobin in place of oxygen, causing the heart and respiratory systems to work harder?

Which of these is the single largest source of electrical power in the United States?

How many kilowatt-hours is generated when burning 2.5 g of methane produces 125 kJ of heat?

Which of these is the most significant greenhouse gas?

Which of these involves a net increase in entropy? I. Condensation of steam II. Freezing of methanol III. Evaporation of ethanol IV. Extraction of salts from seawater

A reaction which absorbs heat from the surroundings is known as a(n)____.

Which of these statements about fossil fuels is incorrect ?

The amount of heat necessary to change a given amount of a substance by 1 ° C is known as ____.

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

Filters

How many kJ of heat are released when 54.9 grams of manganese is burned forming Mn₃O₄(s). The Δ H for the reaction is − 25.3 kJ\g.