Week 6 Thermodynamics

Question 0

Gas to solid

Answer 0

Deposition

Question 1

Solid to gas

Answer 1

Sublimation

Question 2

Gas to liquid

Answer 2

Condensation

Question 3

Liquid to gas

Answer 3

Evaporation

Question 4

Liquid to solid

Answer 4

Freezing

Question 5

Solid to liquid

Answer 5

Melting

Question 6

What three processes take heat from the environment?

Answer 6

Melting, evaporation, sublimation

Question 7

What three processes add heat to the environment?

Answer 7

Condensation, deposition, freezing

Question 8

Amount of heat to melt one gram of ice is __ calories and is called the heat of __ of water

Answer 8

80 calories

Heat of fusion of water

Question 9

Suppose you have a gram of water at 20* and you add heat. How much will the water temp rise if you add one calorie?

Answer 9

One calorie = one degree warmer

Question 10

When water reaches 100*, it starts to evaporate. To change one gram of water to vapor requires ___ calories and is called the heat of ___

Answer 10

540 calories to vaporize one gram of water

Heat of vaporization

Question 11

Which requires more energy, heat of fusion or heat of vaporization?

Answer 11

heat of fusion = 80 calories

heat of vaporization = 540 calories