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प्रश्न
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 |
उत्तर
| Column A | Column B |
| 1) Specific latent heat of fusion | b) Solid converts into liquid |
| 2) Specific latent heat of vaporisation | c) liquid converts into gas |
| 3) Dew point temperature | a) Air saturated with vapour |
APPEARS IN
संबंधित प्रश्न
State two characteristics of a good thermion emitter.
What do you understand by the term latent heat?
Explain the following:
The heat supplied to a substance during it change of state, does not cause any rise in its temperature.
A refrigerator converts 100g of water at 20℃ to ice at – 10℃ in 73.5 min. Calculate the average rate of heat extraction in watt. The specific heat capacity of water is 4.2 J kg-1 K-1, specific latent heat of ice is 336 J g-1 and the specific heat capacity of ice is 2.1 J kg-1 K-1.
Explain the following temperature vs time graph.
A thermally insulated pot has 150 g ice at temperature 0°C. How much steam of 100°C has to be mixed to it, so that water of temperature 50°C will be obtained? (Given : latent heat of melting of ice = 80 cal/g, latent heat of vaporization of water = 540 cal/g, specific heat of water = 1 cal/g °C)
Water expands on reducing its temperature below ______°C.
What do you mean by the statement?
'The specific latent heat capacity of fusion of ice is 336 J per g'?
What happens to the heat supplied to a substance when the heat supplied causes no change in the temperature of the substance?
Why water get cooled in a ‘Surahi’ in hot season?
Define the term ‘specific latent heat of fusion’ of a substance.
What do you understand by the ‘latent heat of vaporization’ of a substance?
Derive an expression for the amount of heat given out or taken up, when its temperature falls or rises by t°C.
What observation you will record and how will you determine the specific latent heat of fusion of ice?
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
During reheating, ice is converted to water at a temperature of 0 °C.
Write scientific reason.
Use a pressure cooker to cook food in cold air.
For the same mass of ice and ice-cold water, why does ice produce more cooling than ice-cold water?
