Question 1

A food sample contains 6 g of carbohydrate and 4 g of protein.How many kcal from carbohydrate and protein are in the sample?

Accepted Answer

The answer of A food sample contains 6 g of...

Question 2

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

Question 3

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 D

Question 4

Bromine  )has a freezing point of -7 °C,and a boiling point of 60 °C.
Indicate the state present or the change of state occurring at each temperature.
--15 °C

Accepted Answer

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

Question 5

Which of the following is a chemical change?

Accepted Answer

A)  cutting a rope
B)  bending a steel rod
C)  making a snowman
D)  burning sugar
E)  melting gold D

Question 6

In a gas,the distance between the particles is ________.

Accepted Answer

A)  very close relative to the size of the molecules
B)  close relative to the size of the molecules
C)  fixed relative to the size of the molecules
D)  small relative to the size of the molecules
E)  very large relative to the size of the molecules

Question 7

The phrase "ability to do work" is a definition of ________.

Accepted Answer

A)  specific heat
B)  energy
C)  calorie
D)  heating
E)  cooling

Question 8

Water freezes at 100 °C.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following quantities is not required to calculate the amount of heat energy required to heat water from 25 °C to 55 °C?

Accepted Answer

A)  the mass of the water sample
B)  the initial temperature
C)  the final temperature
D)  the specific heat of water
E)  the heat of vaporization for water

Question 10

The specific heat has units of kcal.

Accepted Answer

A) True 
 B)False

Question 11

The heat of fusion of water is larger than the heat of vaporization.

Accepted Answer

A) True 
 B)False

Question 12

Kinetic energy is the energy of motion.

Accepted Answer

A) True 
 B)False

Question 13

Coins in a piggy bank are an example of a(n) ________.

Accepted Answer

A)  compound
B)  heterogeneous mixture
C)  element
D)  homogeneous mixture
E)  none of the above

Question 14

The heat of fusion is the amount of heat necessary to change one gram of a substance from the solid to the ________ state at its melting point.

Accepted Answer

The answer of The heat of fusion is the amount...

Question 15

The energy stored in molecules is ________.

Accepted Answer

A)  specific heat
B)  kinetic energy
C)  potential energy
D)  work
E)  a calorie

Question 16

Liquid water changing to ice is an example of a ________ change.

Accepted Answer

physical

Question 17

One gram of fat has less energy that one gram of protein.

Accepted Answer

A) True 
 B)False

Question 18

A temperature of 50.°F is equivalent to ________°C.

Accepted Answer

The answer of A temperature of 50.°F is equivalent to...

Question 19

The ________ state of matter has a constant shape and volume.

Accepted Answer

The answer of The ________ state of matter has a...

Question 20

Climate change is believed to result from all of the following except ________.

Accepted Answer

A)  burning of fossil fuels
B)  increasing levels of carbon dioxide in the atmosphere
C)  deforestation
D)  movement of the earth closer to the sun
E)  carbon dioxide trapping the heat produced by the sun

Exam 3: Matter and Energy

A food sample contains 6 g of carbohydrate and 4 g of protein.How many kcal from carbohydrate and protein are in the sample?

Correct AnswerverifiedShow Answer

3.25 kcal is the same amount of energy as ________.

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedD

Bromine )has a freezing point of -7 °C,and a boiling point of 60 °C. Indicate the state present or the change of state occurring at each temperature. --15 °C

Correct AnswerverifiedShow Answer

Which of the following is a chemical change?

Correct AnswerverifiedD

In a gas,the distance between the particles is ________.

Correct AnswerverifiedShow Answer

The phrase "ability to do work" is a definition of ________.

Correct AnswerverifiedShow Answer

Water freezes at 100 °C.

Correct AnswerverifiedShow Answer

Which of the following quantities is not required to calculate the amount of heat energy required to heat water from 25 °C to 55 °C?

Correct AnswerverifiedShow Answer

The specific heat has units of kcal.

Correct AnswerverifiedShow Answer

The heat of fusion of water is larger than the heat of vaporization.

Correct AnswerverifiedShow Answer

Kinetic energy is the energy of motion.

Correct AnswerverifiedShow Answer

Coins in a piggy bank are an example of a(n) ________.

Correct AnswerverifiedShow Answer

The heat of fusion is the amount of heat necessary to change one gram of a substance from the solid to the ________ state at its melting point.

Correct AnswerverifiedShow Answer

The energy stored in molecules is ________.

Correct AnswerverifiedShow Answer

Liquid water changing to ice is an example of a ________ change.

Correct Answerverifiedphysical

One gram of fat has less energy that one gram of protein.

Correct AnswerverifiedShow Answer

A temperature of 50.°F is equivalent to ________°C.

Correct AnswerverifiedShow Answer

The ________ state of matter has a constant shape and volume.

Correct AnswerverifiedShow Answer

Climate change is believed to result from all of the following except ________.

Correct AnswerverifiedShow Answer

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