Week 12

Heat and Heat Transfer Methods

Concepts Map of the Week

Note: image by Chudaeva, E. (2022).

Concept Trailer

Heat Transfer

Watch this video.

Then watch the video again and answer the following questions:

1. What is heat conduction? State the formula and explain all variables.
2. What have you learned about heat transfer?
3. What is convection? Illustrate by example.
4. What is radiation?
5. Provide an example of a situation from everyday life to illustrate heat conduction, convection, and radiation.

Key Terms

Review the following key terms (Glossary chapter 14):

conduction

heat transfer through stationary matter by physical contact

convection

heat transfer by the macroscopic movement of fluid

emissivity

measure of how well an object radiates

heat

the spontaneous transfer of energy due to a temperature difference

heat of sublimation

the energy required to change a substance from the solid phase to the vapor phase

latent heat coefficient

a physical constant equal to the amount of heat transferred for every 1 kg of a substance during the change in phase of the substance

mechanical equivalent of heat

the work needed to produce the same effects as heat transfer

radiation

energy transferred by electromagnetic waves directly as a result of a temperature difference

rate of conductive heat transfer

rate of heat transfer from one material to another

specific heat

the amount of heat necessary to change the temperature of 1.00 kg of a substance by 1.00 ºC

sublimation

the transition from the solid phase to the vapor phase

thermal conductivity

the property of a material’s ability to conduct heat

More terms can be found in the textbook Glossary.