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SS2: PHYSICS - 2ND TERM

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  1. Mechanical Energy & Machines | Week 1
    5 Topics
    |
    1 Quiz
  2. Temperature & its Measurement I | Week 2
    3 Topics
    |
    1 Quiz
  3. Temperature & its Measurement II | Week 3
    7 Topics
    |
    1 Quiz
  4. Heat Energy Measurement | Week 4
    4 Topics
    |
    1 Quiz
  5. Latent Heat I | Week 5
    4 Topics
    |
    1 Quiz
  6. Latent Heat of Vaporisation | Week 6
    2 Topics
    |
    1 Quiz
  7. Vapour Pressure | Week 7
    7 Topics
    |
    1 Quiz
  8. Gas Laws | Week 8
    5 Topics
    |
    1 Quiz



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Topic Content:

  • Meaning of Latent Heat
  • Specific Latent Heat of a Substance
  • Specific Latent Heat of Fusion

What is Latent Heat?

Latent heat is the quantity of heat energy that is required to change a substance from one state to another at constant temperature and pressure.

The unit of latent heat is Joule (J), and the symbol used for latent heat is Q.

Specific Latent Heat of a Substance:

Specific latent heat of a substance can also be defined as the quantity of heat energy that is required to change a unit mass (1 kg) of the substance from one state to another without a change in temperature (constant temperature).

There are different types of specific latent heat, this includes specific latent heat of fusion, and specific latent heat of vaporization which we will be discussing. There is also specific latent heat of sublimation.

latent heat

What is the difference between Latent heat and Specific heat?
Ans:
Latent heat is the quantity of heat transfer during the change in state, whereas Specific heat is the quantity of heat required to change the temperature of unit mass by one degree.

Specific Latent Heat of Fusion:

 

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