Question 1

Flammability of gasoline is a chemical property.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following is NOT a technique that could be used to separate a mixture into its components?

Accepted Answer

A)  stirring
B)  decanting
C)  filtration
D)  distillation
E)  none of the above

Question 3

A moving bowling ball has kinetic energy.

Accepted Answer

A) True 
 B)False

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

The corrosion of iron is a physical change.

Accepted Answer

A) True 
 B)False

Question 6

What is the specific heat (J/g∙°C) of a metal object whose temperature increases by 3.0°C when 17.5 g of metal was heated with 38.5 J?

Accepted Answer

A)  4.18
B)  0.15
C)  0.73
D)  1.4
E)  none of the above

Question 7

An energy diagram that shows the products having higher energy than the reactants illustrates an endothermic reaction.

Accepted Answer

A) True 
 B)False

Question 8

Given the table of specific heat values below,what is the identity of a 26.2 g metal sample that increases by 8.5°C when 100.0 J of energy is absorbed?

Accepted Answer

A)  Fe
B)  Al
C)  Au
D)  Ag
E)  none of the above

Question 9

Which state of matter has atomic spacing that is close together and definite shape?

Accepted Answer

A)  liquid
B)  solid
C)  gas
D)  plasma
E)  none of the above

Question 10

All of the following can be considered physical properties EXCEPT:

Accepted Answer

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

Question 11

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 above

Question 12

If a particular process is endothermic,the reverse process must be a (an) :

Accepted Answer

A)  chemical change.
B)  isothermal process.
C)  exothermic process.
D)  endothermic process.
E)  none of the above

Question 13

Saltwater is a homogeneous mixture.

Accepted Answer

A) True 
 B)False

Question 14

When a cold ice cube is dropped into a warm cup of water,energy is transferred as heat from the ice to the water.

Accepted Answer

A) True 
 B)False

Question 15

When a chemical "cold pack" is activated,the chemical reactants absorb heat from the surroundings.

Accepted Answer

A) True 
 B)False

Question 16

Liquid and gas molecules can easily be compressed,while in a solid the molecules are incompressible.

Accepted Answer

A) True 
 B)False

Question 17

If a pure material decomposes when heated into simpler substances,this proves that the material was a compound.

Accepted Answer

A) True 
 B)False

Question 18

In physical changes,the atoms or molecules that compose the matter do not change their identity,even though the matter may change its appearance.

Accepted Answer

A) True 
 B)False

Question 19

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 above

Question 20

How many joules are there in a 255 calorie snack bar?

Accepted Answer

A)  2.55 × 105
B)  1.07 × 106
C)  1.07 × 103
D)  6.09 × 104
E)  none of the above

Exam 3: Matter and Energy

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

Correct AnswerverifiedShow Answer

In physical changes,the atoms or molecules that compose the matter do not change their identity,even though the matter may change its appearance.

Correct AnswerverifiedShow Answer

Saltwater is a homogeneous mixture.

Correct AnswerverifiedShow Answer

How many joules are there in a 255 calorie snack bar?

Correct AnswerverifiedShow Answer

All of the following can be considered physical properties EXCEPT:

Correct AnswerverifiedShow Answer

Flammability of gasoline is a chemical property.

Correct AnswerverifiedShow Answer

Which of the following is NOT a technique that could be used to separate a mixture into its components?

Correct AnswerverifiedShow Answer

Which state of matter has atomic spacing that is close together and definite shape?

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

If a pure material decomposes when heated into simpler substances,this proves that the material was a compound.

Correct AnswerverifiedShow Answer

What is the specific heat (J/g∙°C) of a metal object whose temperature increases by 3.0°C when 17.5 g of metal was heated with 38.5 J?

Correct AnswerverifiedShow Answer

When a chemical "cold pack" is activated,the chemical reactants absorb heat from the surroundings.

Correct AnswerverifiedShow Answer

Liquid and gas molecules can easily be compressed,while in a solid the molecules are incompressible.

Correct AnswerverifiedShow Answer

An energy diagram that shows the products having higher energy than the reactants illustrates an endothermic reaction.

Correct AnswerverifiedShow Answer

When a cold ice cube is dropped into a warm cup of water,energy is transferred as heat from the ice to the water.

Correct AnswerverifiedShow Answer

If a particular process is endothermic,the reverse process must be a (an) :

Correct AnswerverifiedShow Answer

Given the table of specific heat values below,what is the identity of a 26.2 g metal sample that increases by 8.5°C when 100.0 J of energy is absorbed?

Correct AnswerverifiedShow Answer

A moving bowling ball has kinetic energy.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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