Question 1

When bringing water to a boil in the mountains,the time needed to reach the boiling point is

Accepted Answer

A) less than at sea level. 
B) more than at sea level. 
C) the same as at sea level. 
A) less than at sea level. 
B) more than at sea level. 
C) the same as at sea level.

Question 2

A hot dog pants

Accepted Answer

A) to help evaporation occur in its mouth and bronchial tract. 
B) to bring more oxygen into its lungs. 
C) for no particular reason - some things just happen. 
D) to impress dogs of the opposite sex. 
A) to help evaporation occur in its mouth and bronchial tract. 
B) to bring more oxygen into its lungs. 
C) for no particular reason - some things just happen. 
D) to impress dogs of the opposite sex.

Question 3

When snow forms in clouds,the surrounding air

Accepted Answer

A) warms. 
B) cools. 
C) neither warms nor cools. 
A) warms. 
B) cools. 
C) neither warms nor cools.

Question 4

To say that evaporation is a cooling process is to say that the

Accepted Answer

A) more energetic particles escape. 
B) more energetic particles remain in the water. 
C) the less energetic particles escape. 
A) more energetic particles escape. 
B) more energetic particles remain in the water. 
C) the less energetic particles escape.

Question 5

Compared to a glass of ice water with ice in it,a glass of plain ice-cold water without ice on a warm day will warm up

Accepted Answer

A) faster. 
B) slower. 
C) in the same amount of time. 
D) None of the above choices are true. 
A) faster. 
B) slower. 
C) in the same amount of time. 
D) None of the above choices are true.

Question 6

To increase the temperature of 50 grams of water by 2 Celsius degrees requires

Accepted Answer

A) 0)04 calorie. 
B) 2 calories. 
C) 4)18 calories. 
D) 25 calories. 
E) 100 calories. 
A) 0)04 calorie. 
B) 2 calories. 
C) 4)18 calories. 
D) 25 calories. 
E) 100 calories.

Question 7

Ice is put in a cooler to cool the contents.To speed up the cooling process,the ice can be

Accepted Answer

A) wrapped in newspaper. 
B) drained of ice water periodically. 
C) kept out of contact with the food. 
D) kept in one solid chunk. 
E) covered with salt. 
A) wrapped in newspaper. 
B) drained of ice water periodically. 
C) kept out of contact with the food. 
D) kept in one solid chunk. 
E) covered with salt.

Question 8

Increased air pressure on the surface of hot water tends to

Accepted Answer

A) prevent boiling. 
B) promote boiling. 
C) Neither choice A nor choice B is true. 
D) Choice A and choice B are both true. 
A) prevent boiling. 
B) promote boiling. 
C) Neither choice A nor choice B is true. 
D) Choice A and choice B are both true.

Question 9

Consider a steaming aluminum soda-pop can that contains a small amount of boiling water.When it is quickly inverted into a bath of cooler water the can is dramatically crushed by atmospheric pressure.This occurs because the pressure inside the can is rapidly reduced by

Accepted Answer

A) contact with the relatively cool water. 
B) sudden slowing of the air and steam molecules inside. 
C) condensation of steam inside. 
D) reduced internal energy. 
E) rapid conduction of heat to the relatively cool water. 
A) contact with the relatively cool water. 
B) sudden slowing of the air and steam molecules inside. 
C) condensation of steam inside. 
D) reduced internal energy. 
E) rapid conduction of heat to the relatively cool water.

Question 10

A refrigerator

Accepted Answer

A) produces cold. 
B) causes internal energy to disappear. 
C) removes internal energy from inside the refrigerator. 
D) changes heat into cold. 
E) none of these 
A) produces cold. 
B) causes internal energy to disappear. 
C) removes internal energy from inside the refrigerator. 
D) changes heat into cold. 
E) none of these

Question 11

The food in a refrigerator is cooled by

Accepted Answer

A) vaporization of the refrigerating fluid. 
B) condensation of the refrigerating fluid. 
C) the ice in your nearby freezer. 
A) vaporization of the refrigerating fluid. 
B) condensation of the refrigerating fluid. 
C) the ice in your nearby freezer.

Question 12

For increased atmospheric pressure,the boiling temperature of a liquid

Accepted Answer

A) goes down. 
B) goes up. 
C) remains at 100 degrees C. 
A) goes down. 
B) goes up. 
C) remains at 100 degrees C.

Exam 17: Change of Phase

When bringing water to a boil in the mountains,the time needed to reach the boiling point is

A hot dog pants

When snow forms in clouds,the surrounding air

To say that evaporation is a cooling process is to say that the

Compared to a glass of ice water with ice in it,a glass of plain ice-cold water without ice on a warm day will warm up

To increase the temperature of 50 grams of water by 2 Celsius degrees requires

Ice is put in a cooler to cool the contents.To speed up the cooling process,the ice can be

Increased air pressure on the surface of hot water tends to

Consider a steaming aluminum soda-pop can that contains a small amount of boiling water.When it is quickly inverted into a bath of cooler water the can is dramatically crushed by atmospheric pressure.This occurs because the pressure inside the can is rapidly reduced by

A refrigerator

The food in a refrigerator is cooled by

For increased atmospheric pressure,the boiling temperature of a liquid

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