Summarizing Heat

Summary

  • Heat and work are the two distinct methods of energy transfer.
  • Heat is energy transferred solely due to a temperature difference.
  • Any energy unit can be used for heat transfer, and the most common are kilocalorie (kcal) and joule (J).
  • Kilocalorie is defined to be the energy needed to change the temperature of 1.00 kg of water between \(\text{14}\text{.5ºC}\) and \(\text{15}\text{.5ºC}\).
  • The mechanical equivalent of this heat transfer is \(1\text{.00 kcal}\phantom{\rule{0.25em}{0ex}}=\phantom{\rule{0.25em}{0ex}}\text{4186 J.}\)

Glossary

heat

the spontaneous transfer of energy due to a temperature difference

kilocalorie

\(\phantom{\rule{0.25em}{0ex}}1\phantom{\rule{0.25em}{0ex}}\text{kilocalorie}\phantom{\rule{0.25em}{0ex}}\text{=}\phantom{\rule{0.25em}{0ex}}\text{1000}\phantom{\rule{0.25em}{0ex}}\text{calories}\)

mechanical equivalent of heat

the work needed to produce the same effects as heat transfer

[Attributions and Licenses]


This is a lesson from the tutorial, Heat and Heat Transfer Methods and you are encouraged to log in or register, so that you can track your progress.

Log In

Share Thoughts