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प्रश्न
Explain the meaning of the term latent heat. State its S. I. unit.
उत्तर
The heat absorbed or liberated by a substance during its change of state at a constant temperature is called latent heat. Its S. I. unit is J/kg.
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संबंधित प्रश्न
What is the Greenhouse effect?
What do you understand by the term latent heat?
Define the following terms:
(i) Latent heat,
(ii) Latent heat of fusion of ice.
A substance changes from its solid state to the liquid state when heat is supplied to it. What name is given to heat absorbed by the substance.
What happens to the heat supplied to a substance when the heat supplied causes no change in the temperature of the substance?
Why does weather become pleasant when it starts freezing in cold countries?
Why water get cooled in a ‘Surahi’ in hot season?
What do you understand by the ‘latent heat of vaporization’ of a substance?
Explain the meaning of greenhouse effect.
State two advantages of the high specific latent heat capacity of steam, which is about 226 × 104 J/kg?
State the main precautions to be taken in finding the latent heat of steam.
What observation you will record and how will you determine the specific latent heat of fusion of ice?
Steam at 100°C is passed over 1000 g of ice at 0°C. After some time, 600 g of ice at 0°C is left and 450 g of water at 0°C is formed. Calculate the specific latent heat of vaporization of steam (Given: specific heat capacity of water = 4200 J/kg°C, specific latent heat of fusion of ice = 336,000 J/kg.)
Define boiling point of a liquid.
Match the columns.
| Column A | Column B |
| 1) Specific latent heat of fusion | a) Air saturated with vapour |
| 2) Specific latent heat of vaporisation | b) Solid converts into liquid |
| 3) Dew point temperature | c) liquid converts into gas |
Who introduced the term latent heat?
Calculate the amount of heat required to convert 200g of ice at 0°C into the water at 0°C Specific latent heat of fusion of ice = 336 Jg-1
