Question 1

The process of boiling water is an endothermic process.

Accepted Answer

A) True 
 B)False

Question 2

Water is a mixture.

Accepted Answer

A) True 
 B)False

Question 3

How would you classify raisin bran?

Accepted Answer

A)  pure substance-compound
B)  mixture-heterogeneous
C)  pure substance-element
D)  mixture-homogeneous
E)  none of the aboveF) B) and E)
G) A) and E)

Question 4

A 15.0 gram lead ball at 25.0°C was heated with 40.5 joules of heat.Given the specific heat of lead is 0.128 J/g∙°C,what is the final temperature of the lead?

Accepted Answer

A)  21.1°C
B)  46.1°C
C)  77.8°C
D)  0.844°C
E)  none of the aboveF) A) and D)
G) A) and C)

Question 5

All of the following can be considered physical properties EXCEPT:

Accepted Answer

A)  taste.
B)  color.
C)  flammability.
D)  density.
E)  boiling point.F) A) and E)
G) B) and E)

Question 6

The corrosion of iron is a physical change.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following statements about compounds is TRUE?

Accepted Answer

A)  A substance that cannot be broken down into simpler substances.
B)  A pure substance that has variable composition throughout.
C)  A substance composed of two or more elements in fixed,definite proportions.
D)  A substance that is not as common as pure elements.
E)  none of the aboveF) A) and D)
G) C) and D)

Question 8

From the following list of substances and heat capacities,choose the one that will have the lowest temperature after absorbing 100.0 kJ of heat.Assume identical masses of each substance start at the same initial temperature.

Accepted Answer

A)  lead-0.128 J/g∙°C
B)  copper-0.385 J/g∙°C
C)  ethanol-2.42 J/g∙°C
D)  water-4.18 J/g∙°C
E)  not enough informationF) A) and E)
G) B) and E)

Question 9

In a chemical reaction,the substances present after the chemical change are called reactants.

Accepted Answer

A) True 
 B)False

Question 10

How many calories are there in a 255 Calorie snack bar?

Accepted Answer

A)  2.55 × 105
B)  1.07 × 103
C)  60.9
D)  1 × 103
E)  none of the aboveF) A) and E)
G) B) and E)

Question 11

Matter can be destroyed in a combustion reaction (such as burning fuel).

Accepted Answer

A) True 
 B)False

Question 12

How many kilojoules are there in 95.0 Calories?

Accepted Answer

A)  2.27 × 107
B)  3.97 × 10-4
C)  397
D)  22.7
E)  none of the aboveF) A) and C)
G) A) and B)

Question 13

An energy diagram that shows the reactants having greater energy than the products illustrates an:

Accepted Answer

A)  endothermic reaction.
B)  exothermic reaction.
C)  isothermic reaction.
D)  impossible reaction.
E)  none of the aboveF) D) and E)
G) B) and D)

Question 14

Which of the following items is a chemical property?

Accepted Answer

A)  the paint color on a new red Corvette
B)  the odor of spearmint gum
C)  the melting and boiling point of water
D)  the tarnishing of a copper statue
E)  none of the aboveF) C) and D)
G) B) and D)

Question 15

In order,what is the freezing point,room temperature and boiling point of water according to the Celsius scale?

Accepted Answer

A)  32-75-212
B)  0-75-100
C)  0-25-100
D)  0-298-373
E)  none of the aboveF) B) and D)
G) A) and E)

Question 16

A compound is a substance that cannot be broken down into a simpler substance.

Accepted Answer

A) True 
 B)False

Question 17

How much heat (kJ) is needed to raise the temperature of 100.0 grams of water from 25.0°C to 
?

Accepted Answer

A)  10450
B)  0.598
C)  1.05
D)  10.5
E)  none of the aboveF) A) and B)
G) A) and C)

Question 18

Temperatures reported in the Kelvin scale cannot be negative.

Accepted Answer

A) True 
 B)False

Question 19

Matter is defined as anything that is visible to the human eye.

Accepted Answer

A) True 
 B)False

Question 20

What is the final temperature of 25.0 grams of water at 22.0°C after it absorbs 
Of heat?

Accepted Answer

A)  17.7
B)  4.29
C)  26.3
D)  15.8
E)  none of the aboveF) A) and B)
G) A) and C)

Exam 3: Matter and Energy

Temperatures reported in the Kelvin scale cannot be negative.

Correct AnswerverifiedShow Answer

All of the following can be considered physical properties EXCEPT:

Correct AnswerverifiedShow Answer

A 15.0 gram lead ball at 25.0°C was heated with 40.5 joules of heat.Given the specific heat of lead is 0.128 J/g∙°C,what is the final temperature of the lead?

Correct AnswerverifiedShow Answer

In order,what is the freezing point,room temperature and boiling point of water according to the Celsius scale?

Correct AnswerverifiedShow Answer

Matter can be destroyed in a combustion reaction (such as burning fuel).

Correct AnswerverifiedShow Answer

From the following list of substances and heat capacities,choose the one that will have the lowest temperature after absorbing 100.0 kJ of heat.Assume identical masses of each substance start at the same initial temperature.

Correct AnswerverifiedShow Answer

Matter is defined as anything that is visible to the human eye.

Correct AnswerverifiedShow Answer

An energy diagram that shows the reactants having greater energy than the products illustrates an:

Correct AnswerverifiedShow Answer

Which of the following statements about compounds is TRUE?

Correct AnswerverifiedShow Answer

Which of the following items is a chemical property?

Correct AnswerverifiedShow Answer

In a chemical reaction,the substances present after the chemical change are called reactants.

Correct AnswerverifiedShow Answer

The process of boiling water is an endothermic process.

Correct AnswerverifiedShow Answer

A compound is a substance that cannot be broken down into a simpler substance.

Correct AnswerverifiedShow Answer

Water is a mixture.

Correct AnswerverifiedShow Answer

How much heat (kJ) is needed to raise the temperature of 100.0 grams of water from 25.0°C to ?

Correct AnswerverifiedShow Answer

How many calories are there in a 255 Calorie snack bar?

Correct AnswerverifiedShow Answer

How many kilojoules are there in 95.0 Calories?

Correct AnswerverifiedShow Answer

The corrosion of iron is a physical change.

Correct AnswerverifiedShow Answer

How would you classify raisin bran?

Correct AnswerverifiedShow Answer

What is the final temperature of 25.0 grams of water at 22.0°C after it absorbs Of heat?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified