3.2 moderation of temperature

Question 1

how does water moderate temperature?

Answer 1

it absorbs warm air (making it cooler) and then releases it (making it warmer)

Question 2

the energy of motion:

Answer 2

kinetic energy

Question 3

a form of energy

a measure of the matter’s total kinetic energy due to the motion of its molecules:

Answer 3

heat

Question 4

does heat depend on volume

Answer 4

yes

Question 5

measures heat intensity

the average kinetic energy of the molecules regardless of volume:

Answer 5

temperature

Question 6

heat vs temperature

Answer 6

total Ke vs
average Ke

hot water has higher temp than a swimming pool but the pool has higher heat (because of large volume)

Question 7

Celsius scale:
freeze
boil
body temp
room temp

Answer 7

freeze: 0ºC
boil: 100ºC
body temp: 37ºC
room temp: 20-25ºC

Question 8

1 calorie= (raise temperature)

Answer 8

the amount of heat it takes to raise the temperature of 1g of water 1ºC

Question 9

1 calorie = (lower temperature)

Answer 9

the amount of heat released when 1g of water is cooled 1ºC

Question 10

1 kilocalorie=

Answer 10

the amount of heat it takes to raise 1 kilogram of water 1ºC

Question 11

1 joule= ___cal

Answer 11

.239cal

Question 12

1 cal=____joules

Answer 12

4.184j

Question 13

what is specific heat

Answer 13

the amount heat that must be absorbed or lost to change 1g of a substance by 1ºC

Question 14

the specific heat of water =

Answer 14

1cal/g/ºC

Question 15

why does water have high specific heat

Answer 15

hydrogen bonds

heat is needed to break bonds
and heat is released when bonds form

Question 16

what is heat of vaporization

Answer 16

how much heat is required for 1g of something to be converted from liquid to gas

Question 17

when liquid evaporates an the surface of the liquid that remains cools:

Answer 17

evaporative cooling