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संबंधित प्रश्न
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.
Explain the following:
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?
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.
Define the following terms:
(i) Latent heat,
(ii) Latent heat of fusion of ice.
What is the name given to the energy absorbed during a phase change?
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.
Explain why water is used in hot water bottles for fomentation and also as a universal coolant.
What do you understand by the ‘latent heat of vaporization’ of a substance?
1 kg of water is contained in a 1.25 kW kettle. Assuming specific heat capacity of water = 4.2 J/g °C and specific latent heat of vaporization = 2260 J/g, calculate:
(i) the time taken for the temperature of water to rise from 25°C to its boiling point,
(ii) the mass of water which evaporates per minute from the boiling water.
When ice is converted into water : constant temperature : : before the water evaporates : _______
Find the odd one out and give its explanation.
Write the name.
Products obtained when sugar is heated.
The latent heat of vaporisation is a term referred for the conversion of gas into liquid.
Write scientific reason.
The bottom of some steel utensils used for cooking is copper.
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 ______.
