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प्रश्न
The specific latent heat of vaporisation of steam is 2260 J/g. Comment on this.
उत्तर
The heat required to convert 1 g of water at 100°C to 1 g steam at 100°C is 2260 J.
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संबंधित प्रश्न
What do you understand by the term latent heat?
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.
A molten metal of mass 150 g is kept at its melting point 800℃. When it is allowed to freeze at the same temperature, it gives out 75,000 J of heat energy.
- What is the specific latent heat of the metal?
- If the specific heat capacity of metal is 200 J kg-1 K-1, how much additional heat energy will the metal give out in cooling to -50℃?
What is the name given to the energy absorbed during a phase change?
Define specific latent heat of vaporization of a substance.
Explain the meaning of the term latent heat. State its S. I. unit.
Give one consequence of the high specific latent heat of fusion of ice.
What do you understand by the ‘latent heat of vaporization’ of a substance?
State two advantages of the high specific latent heat capacity of steam, which is about 226 × 104 J/kg?
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).
Steam at 100°C is passed over 1000 g of ice at 0°C. After some time, 600 g of ice at 0°C is left and 450 g of water at 0°C is formed. Calculate the specific latent heat of vaporization of steam (Given: specific heat capacity of water = 4200 J/kg°C, specific latent heat of fusion of ice = 336,000 J/kg.)
Define boiling point of a liquid.
1 kg of dry air at a temperature of 40 °C can hold a maximum of 49 g of water vapour.
Specific latent heat L = ______.
Who introduced the term latent heat?
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)
The amount of heat energy required to melt a given mass of a substance at its melting point without any rise in its temperature is called as the ______.
The diagram below shows a cooling curve for a substance:
- State the temperatures at which the substance condenses.
- The temperature range in which the substance is in liquid state.
- Why do we prefer ice to ice-cold water for cooling a drink?
