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प्रश्न
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संबंधित प्रश्न
State two factors upon which the rate of emission of thermions depends.
- Which requires more heat: 1 g ice at 0℃ or 1 g water at 0℃ to raise its temperature to 10℃?
- Explain your answer in part (a).
Explain the following:
The surrounding become pleasantly warm when water in a lake starts freezing in cold countries.
The S.I. unit of specific latent heat is ______.
Answer the following:
Explain the role of latent heat in the change of state of a substance.
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.
Define specific latent heat of vaporization of a substance.
Name two factors on which the heat absorbed or given out by a body depends.
Explain the meaning of the term latent heat. State its S. I. unit.
When 1 g of ice at 0 °C melts to form 1 g of water at 0 °C then, is the latent heat absorbed by the ice or given out by it?
The specific latent heat of vaporisation of steam is 2260 J/g. Comment on this.
Explain the statement; “The specific latent heat of vaporization of wafer is 2260 × 103 J/kg”.
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
How fog is formed?
Write scientific reason.
Even if boiling water is constantly heated, its temperature does not rise.
Define specific latent heat capacity
2875 J of heat is required to melt 115 g of lead at its melting point. Calculate the specific latent heat capacity of fusion of lead.
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)
