Chapter 8

Question 1

Fast-moving molecules

Answer 1

Hot

Question 2

Slow moving molecules

Answer 2

Cold

Question 3

A change that releases heat is called an

A. endothermic process
B. exothermic process

Answer 3

exothermic process

Question 4

A change that absorbs heat is an

A. endothermic process
B. exothermic process

Answer 4

endothermic process

Question 5

Baking Bread

Answer 5

endothermic process (Gains Heat)

Question 6

Making an ice cube

Answer 6

exothermic process (Loss Heat)

Question 7

The SI unit of heat, work, and energy is the

Answer 7

joule (J)

Question 8

A calorie is the amount of energy required to raise one gram of water by __ Kelvin.

Answer 8

1

Question 9

1 calorie = ___ joules

Answer 9

4.184

Question 10

An _________ property is a property that depends on the amount of matter in a sample

A. extensive
B. intensive

Answer 10

extensive

Question 11

An _________ property is a property of matter that depends only on the type of matter in a sample and not on the amount.

A. extensive
B. intensive

Answer 11

intensive

Question 12

Specific heat capacity is an ________ property

Answer 12

intensive

Question 13

The amount of heat, q, entering or leaving a substance can be calculated.

If a substance gains thermal energy, then the value of q is…

Answer 13

positive

Question 14

The amount of heat, q, entering or leaving a substance can be calculated.

If a substance loses thermal energy, then the value of q is…

Answer 14

negative

Question 15

If the reaction is ________, the heat produced by the reaction is absorbed by the solution

Answer 15

exothermic

Question 16

If the reaction is ________, the heat required for the reaction to occur is provided by the solution.

Answer 16

endothermic

Question 17

If ΔH = 54.74 kJ for a chemical reaction, that reaction is

Answer 17

endothermic

Question 18

If ΔH is negative, it indicates that the reaction is _________

Answer 18

exothermic

Question 19

Bomb calorimetry is carried out at _____.

A. constant-volume
B. constant-pressure
C. constant-mass
D. constant temperature

Answer 19

A. constant-volume

Question 20

Your task is to measure the amount of energy evolved during the metabolism. Which of the
following would be the ideal technique for this experiment?

A. coffee-cup calorimetry
B. bomb calorimetry
C. bomb manometry
D. whole-body calorimetry

Answer 20

D. whole-body calorimetry

Question 21

A reaction where the products are higher in energy than the reactants is an example of an _____.

Answer 21

endothermic process

Question 22

An _____ reaction results when the energy required to break bonds in the reactants is greater than the energy released by the formation of products.

Answer 22

endothermic

Question 23

An _____ reaction results when the energy released by the formation of products is greater than the energy required to break the bonds in the reactants.

Answer 23

exothermic