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Physics / Heat

Physics / Heat

You wrap up in blankets in the winter, hold your hands out to feel the warmth of a fire, and jump when you touch any hot object.
Why does this happen? What is this thing which you call as heat?
Heat is a form of energy.

  • Understand the concepts of heat capacity, specific heat capacity and their difference.
  • When a hot body is mixed (or comes in contact ) with a cold body, heat energy passes from hot body to cold body, till both the bodies attain the same temperature. What is this phenomenon known as ? To cool a glass containing hot milk, place it in cold water. Heat flows from hot milk to cold water, until both their temperatures are equalized.
    This process in which Heat energy lost by hot body = heat energy gained by the cold body is known as calorimetry.
    The study of the heat gained or lost during physical processes and chemical reactions is called calorimetry. It is based on the law of conservation of energy.
  • Find out the following concepts - Hot water bottles are used for fermentation, In cold countries water is used as heat reservoir for wine and juice bottles to avoid their freezing.
  • When ice is converted into water at 0oC , It absorbs energy without any increase in temperature. Where does this heat energy go without causing increase in temperature and what is it known as?
    The answer is latent heat - When a substance changes from one state to another, it absorbs or loses a large amount of heat without any change in temperature. It is called hidden heat because it does not show rise in temperature. Understand the concept of latent heat and its applications.
Exercises
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Exercises
Lessons
Topics
  • Heat - SmartTest

    A SmartTest on Heat

    • Accessed by: 789 Students
    • Average Time: 00:05:01
    • Average Score: 50.39
    • Questions: 20
    • Introduction to Heat
    • Flow of heat- Thermal equilibrium
    • Factors affecting heat
    • Thermal capacity or Heat capacity
    • Conductors and insulators
    • Latent Heat
    • Heat Review
    • Calorimetry
  • Heat -- Summary

    Learnhive Lesson on Heat

    • Accessed by: 558 Students

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