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प्रश्न
Why does the heat supplied to a substance during its change of state not cause any rise in its temperature?
उत्तर
During the state change heat supplied increases potential energy of molecules as distance between molecules increases work is done by heat supplied against attractive force.
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संबंधित प्रश्न
A mass of 200 g of mercury at 100°C is poured into water at 20°C. If the final temperature of the mixture is 25°C, find the mass of water. (Sp. heat cap. of mercury is 140 J/kgK).
A piece of copper of mass 1 kg is dropped into 2 kg of water at 15°C. If the final temperature of the mixture is 40°C, calculate the intial temperature of copper.
Explain, why are big tubs of water kept in underground cellars for storing fresh fruit and vegetables in cold countries.
Explain, why is water used as a coolent in motor car radiators?
Ice is more effective in cooling than the ice-water. Explain.
Name the greenhouse gases.
A heater supplies heat at the rate of 800 J/s. Find the time required to convert 50g of ice at -20°C into superheated steam at 140°C.
(Given: Specific heat of ice = 2.1 J/g, latent heat of ice = 340 J/gm, latent heat of steam = 2240 J/gm, specific heat of steam = 2.1 J/gm and specific heat of water = 4.2 J/gm.)
The process of converting a substance from solid state to gaseous state is called condensation.
