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प्रश्न
State the effect of an increase of impurities on the melting point of ice.
उत्तर
Increasing the impurities causes the melting point of ice to decrease.
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संबंधित प्रश्न
State two factors upon which the rate of emission of thermions depends.
1 g ice of 0℃ melts to form 1 g water at 0℃. State whether the latent heat is absorbed or given out by ice.
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?
Answer the following:
Explain the role of latent heat in the change of state of a substance.
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)
Define the following terms:
(i) Specific latent heat,
(ii) Specific latent heat of fusion.
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?
Why water get cooled in a ‘Surahi’ in hot season?
Explain the statement; “The specific latent heat of vaporization of wafer is 2260 × 103 J/kg”.
What observation you will record and how will you determine the specific latent heat of fusion of ice?
Calculate the total amount of heat required to convert 100g ice at 0°C to steam at 100°C.
(Specific latent heat of fusion of ice = 336 J/g, specific latent heat of vaporization of steam = 2260 J/g, specific heat capacity of water = 4.2 J/g°C).
Match the columns.
| Column A | Column B |
| 1) Absolute humidity | a) J or cal |
| 2) Latent heat | b) J/kg °C |
| 3) Specific heat capacity | c) kJ/kg |
| 4) Heat | d) no unit |
| e) kg/m3 |
Write scientific reason.
Even if boiling water is constantly heated, its temperature does not rise.
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
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.
