Lesson 506 of 1524
Heat and Heat Transfer Methods
Any energy unit can be used for heat transfer, and the most common are kilocalorie (kcal) and joule (J)
Practice this chapterAny energy unit can be used for heat transfer, and the most common are kilocalorie (kcal) and joule (J) The transfer of heat Q that leads to a change Δ T in the temperature of a body with mass m is Q = mc Δ T , where c is the specific heat of the material.
This relationship can also be considered as the definition of specific heat Heat and work are the two distinct methods of energy transfer
heat — the spontaneous transfer of energy due to a temperature difference. specific heat — the amount of heat necessary to change the temperature of 1.00 kg of a substance by 1.00 ºC. most common — kilocalorie (kcal) and joule (J). kilocalorie — 1 kilocalorie = 1000 calories.
Worked example
What does “heat” mean in Heat and Heat Transfer Methods?
- 1Use the wording this chapter gives for heat.
- 2The book says: the spontaneous transfer of energy due to a temperature difference.
- 3Do not use the meaning of specific heat. That term means the amount of heat necessary to change the temperature of 1.00 kg of a substance by 1.00 ºC.
Result: the spontaneous transfer of energy due to a temperature difference
Why. That is the meaning this chapter gives for heat.
Do not swap heat and specific heat. heat means the spontaneous transfer of energy due to a temperature difference. specific heat means the amount of heat necessary to change the temperature of 1.00 kg of a substance by 1.00 ºC.
Practice margin
This chapter
A fresh set from this chapter only. Choose 10 or 20. Multiple choice and fill-in, with no repeat inside the set.