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प्रश्न
What is the name given to the energy absorbed during a phase change?
उत्तर
The name given to the energy absorbed during a phase change is latent heat.
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संबंधित प्रश्न
State two characteristics of a good thermion emitter.
Write the approximate value of specific latent heat of ice.
Explain the following:
The surrounding become pleasantly warm when water in a lake starts freezing in cold countries.
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The heat supplied to a substance during it change of state, does not cause any rise in its temperature.
During transformation of liquid phase to solid phase, the latent heat is ______.
What is meant by latent heat? How will the state of matter transform if latent heat is given off?
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Explain the meaning of the term latent heat. State its S. I. unit.
Define the term ‘specific latent heat of fusion’ of a substance.
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Explain the meaning of greenhouse effect.
Derive an expression for the amount of heat given out or taken up, when its temperature falls or rises by t°C.
If there is no Heat loss to the surroundings, the heat released by the condensation of m1 g of steam at 100°C into water at 100°C can be used to convert m2 g of ice at 0°C into water at 0°C.
(i) Find:
(a) The heat lost by steam in terms of m1
(b) The heat gained by ice in terms of m2
(ii) Form a heat equation find the ratio of m2 : m1
Specific latent heat of vaporization of steam = 2268 kJ/kg
Specific latent heat of fusion of ice = 336 kJ/kg
Specific heat capacity of water = 4200 J/kg°C
Find the odd one out and give its explanation.
1 kg of dry air at a temperature of 40 °C can hold a maximum of 49 g of water vapour.
For the same mass of ice and ice-cold water, why does ice produce more cooling than ice-cold water?
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)
Observe the following graph and answer the following questions:
- What does the graph represent?
- What does the line AB represent?
- What does the line BC represent?
