Question 1

The simplest type of pure substance is an ________.

Accepted Answer

The answer of The simplest type of pure substance is...

Question 2

The specific heat of a substance is the amount of heat needed to

Accepted Answer

A) change 1 g of the substance from the solid to the liquid state. 
B) raise the temperature of 1 g of the substance by 1 °C. 
C) change 1 g of the substance from the liquid to the solid state. 
D) convert 1 g of a liquid to gas. 
E) convert 1 g of a solid to a gas. 
A) change 1 g of the substance from the solid to the liquid state. 
B) raise the temperature of 1 g of the substance by 1 °C. 
C) change 1 g of the substance from the liquid to the solid state. 
D) convert 1 g of a liquid to gas. 
E) convert 1 g of a solid to a gas.

Question 3

The specific heat of copper is 0.0920 cal/g °C, and the specific heat of silver is 0.0562 cal/g °C. If 100 cal of heat is added to one g of each metal at 25 °C, what is the expected result?

Accepted Answer

A) The copper will reach a higher temperature. 
B) The silver will reach a higher temperature. 
C) The two samples will reach the same temperature. 
D) The copper will reach a temperature lower than 25 °C. 
E) The silver will soften. 
A) The copper will reach a higher temperature. 
B) The silver will reach a higher temperature. 
C) The two samples will reach the same temperature. 
D) The copper will reach a temperature lower than 25 °C. 
E) The silver will soften.

Question 4

Which of the following is a physical change?

Accepted Answer

A) baking a cake 
B) dry ice subliming 
C) fermenting grapes to produce wine 
D) digesting a meal 
E) a tomato ripening 
A) baking a cake 
B) dry ice subliming 
C) fermenting grapes to produce wine 
D) digesting a meal 
E) a tomato ripening

Question 5

When a solid is converted directly to a gas, the change of state is called

Accepted Answer

A) freezing. 
B) melting. 
C) boiling. 
D) condensation. 
E) sublimation. 
A) freezing. 
B) melting. 
C) boiling. 
D) condensation. 
E) sublimation.

Question 6

Condensation occurs when a liquid is converted to a solid.

Accepted Answer

A) True 
 B)False

Question 7

Bromine (BrS1U1B12S1U1B0) has a freezing point of -7 °C, and a boiling point of 60 °C.
Indicate the state or change of state occurring at each temperature.
-70 °C

Accepted Answer

The answer of Bromine (BrS1U1B12S1U1B0) has a freezing point of...

Question 8

The formation of a gas resulting from the escape of high-energy particles from the surface of a liquid is known as

Accepted Answer

A) evaporation. 
B) deposition. 
C) boiling. 
D) melting. 
E) sublimation. 
A) evaporation. 
B) deposition. 
C) boiling. 
D) melting. 
E) sublimation.

Question 9

3.25 kcal is the same amount of energy as

Accepted Answer

A) 3.25 J. 
B) 0.777 J. 
C) 777 J. 
D) 13600 J. 
E) 13.6 J. 
A) 3.25 J. 
B) 0.777 J. 
C) 777 J. 
D) 13600 J. 
E) 13.6 J.

Question 10

A potato contains 20 g of carbohydrate. If carbohydrate has a caloric value of 4 kcal/g, how many kcal are obtained from the carbohydrate in the potato?

Accepted Answer

A) 5 kcal 
B) 20 kcal 
C) 40 kcal 
D) 60 kcal 
E) 80 kcal 
A) 5 kcal 
B) 20 kcal 
C) 40 kcal 
D) 60 kcal 
E) 80 kcal

Question 11

As a solid melts, its temperature does not change.

Accepted Answer

A) True 
 B)False

Question 12

32 °F is the same temperature as 100 °C.

Accepted Answer

A) True 
 B)False

Question 13

The units of specific heat are cal g/°F.

Accepted Answer

A) True 
 B)False

Question 14

A diet has a total caloric intake of 1400 kcal. If the protein in the diet provides 35% of the kcal, the number of kcal of protein in the diet is

Accepted Answer

A) 700 kcal. 
B) 490 kcal. 
C) 210 kcal. 
D) 460 kcal. 
E) 1200 kcal. 
A) 700 kcal. 
B) 490 kcal. 
C) 210 kcal. 
D) 460 kcal. 
E) 1200 kcal.

Question 15

Will the caloric value of a 100. g hamburger be higher or lower than the caloric value of 100. g of sugar?

Accepted Answer

The answer of Will the caloric value of a 100....

Question 16

The energy of motion is referred to as

Accepted Answer

A) work. 
B) freezing. 
C) specific heat. 
D) potential energy. 
E) kinetic energy. 
A) work. 
B) freezing. 
C) specific heat. 
D) potential energy. 
E) kinetic energy.

Question 17

How many calories are required to raise the temperature of a 150. g sample of gold from 25 °C to 175 °C? The specific heat of gold is 0.0308 cal/g °C.

Accepted Answer

A) 4.62 cal 
B) 116 cal 
C) 22500 cal 
D) 693 cal 
E) 130 cal 
A) 4.62 cal 
B) 116 cal 
C) 22500 cal 
D) 693 cal 
E) 130 cal

Question 18

Helium is a(n)

Accepted Answer

A) compound. 
B) heterogeneous mixture. 
C) element. 
D) homogeneous mixture. 
E) electron. 
A) compound. 
B) heterogeneous mixture. 
C) element. 
D) homogeneous mixture. 
E) electron.

Question 19

Which of the following would NOT be a physical change?

Accepted Answer

A) freezing water to make ice cubes 
B) tearing a piece of aluminum foil 
C) boiling water for soup 
D) burning gasoline in a lawnmower 
E) melting gold to make jewelry 
A) freezing water to make ice cubes 
B) tearing a piece of aluminum foil 
C) boiling water for soup 
D) burning gasoline in a lawnmower 
E) melting gold to make jewelry

Question 20

The boiling point of water on the Celsius scale is ________ °C.

Accepted Answer

The answer of The boiling point of water on the...

Exam 3: Energy and Matter

The simplest type of pure substance is an ________.

The specific heat of a substance is the amount of heat needed to

The specific heat of copper is 0.0920 cal/g °C, and the specific heat of silver is 0.0562 cal/g °C. If 100 cal of heat is added to one g of each metal at 25 °C, what is the expected result?

Which of the following is a physical change?

When a solid is converted directly to a gas, the change of state is called

Condensation occurs when a liquid is converted to a solid.

Bromine (Br2) has a freezing point of -7 °C, and a boiling point of 60 °C. Indicate the state or change of state occurring at each temperature. -70 °C

The formation of a gas resulting from the escape of high-energy particles from the surface of a liquid is known as

3.25 kcal is the same amount of energy as

A potato contains 20 g of carbohydrate. If carbohydrate has a caloric value of 4 kcal/g, how many kcal are obtained from the carbohydrate in the potato?

As a solid melts, its temperature does not change.

32 °F is the same temperature as 100 °C.

The units of specific heat are cal g/°F.

A diet has a total caloric intake of 1400 kcal. If the protein in the diet provides 35% of the kcal, the number of kcal of protein in the diet is

Will the caloric value of a 100. g hamburger be higher or lower than the caloric value of 100. g of sugar?

The energy of motion is referred to as

How many calories are required to raise the temperature of a 150. g sample of gold from 25 °C to 175 °C? The specific heat of gold is 0.0308 cal/g °C.

Helium is a(n)

Which of the following would NOT be a physical change?

The boiling point of water on the Celsius scale is ________ °C.

Chemistry in Our Lives

Chemistry and Measurements

Atoms

Nuclear Chemistry

Ionic and Molecular Compounds

Chemical Reactions and Quantities

Gases

Solutions

Reaction Rates and Chemical Equilibrium

Acids and Bases

Introduction to Organic Chemistry: Hydrocarbons

Alcohols, Phenols, Thiols, and Ethers

Aldehydes, Ketones, and Chiral Molecules

Carbohydrates

Carboxylic Acids and Esters

Lipids

Amines and Amides

Amino Acids and Proteins

Enzymes and Vitamins

Nucleic Acids and Protein Synthesis

Metabolic Pathways for Carbohydrates

Metabolism and Energy Production

Metabolic Pathways for Lipids and Amino Acids

Filters

Bromine (Br₂) has a freezing point of -7 °C, and a boiling point of 60 °C. Indicate the state or change of state occurring at each temperature. -70 °C