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प्रश्न
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.
उत्तर
Latent heat of melting.
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संबंधित प्रश्न
During transformation of liquid phase to solid phase, the latent heat is ______.
Answer the following:
Explain the role of latent heat in the change of state of a substance.
Explain the following temperature vs time graph.
Water expands on reducing its temperature below ______°C.
Explain the following temperature Vs. time graph:
Define the following terms:
(i) Specific latent heat,
(ii) Specific latent heat of fusion.
Explain why water is used in hot water bottles for fomentation and also as a universal coolant.
Explain the meaning of greenhouse effect.
State the main precautions to be taken in finding the latent heat of steam.
Derive an expression for the amount of heat given out or taken up, when its temperature falls or rises by t°C.
1 kg of dry air at a temperature of 40 °C can hold a maximum of 49 g of water vapour.
Write scientific reason.
The bottom of some steel utensils used for cooking is copper.
Define specific latent heat capacity
Who introduced the term latent heat?
Give some practical applications of specific latent heat of ice.
Calculate the total amount of heat energy required to melt 200 g of ice at 0°C to water at 100°C. (Specific latent heat of ice = 336 Jg-1, specific heat capacity of water = 4.2 Jg-1 °C-1)
20 g of ice at 0°C absorbs 10,920 J of heat energy to melt and change to water at 50°C. Calculate the specific latent heat of fusion of ice. Specific heat capacity of water is 4200 J kg-1 K-1.
