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प्रश्न
What is the principle of Calorimetry?
State and explain the principle of Calorimetry.
State the principle of calorimetry.
उत्तर
When a hot body is mixed (or is kept in contact) with a cold body, heat energy passes from the hot body to the cold body, till both the bodies attain the same temperature. If no heat energy is lost to the surroundings (i.e., if the system is perfectly insulated), then this is called the principle of method of mixtures (or the principle of calorimetry).
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संबंधित प्रश्न
What is the other name given to the principle of the mixtures?
How can a temperature in degree Celsius be converted into S.I. unit of temperature?
1300 J of heat energy is supplied to raise the temperature of 6.5 kg of lead from 20° C to 40°C. Calculate the specific heat capacity of lead.
(i) Define Calorimetry.
(ii) Name the material used for making a Calorimeter.
(iii) Why is a Calorimeter made up of thin sheets of the above material answered in (ii).
How much steam at 100oC must be passed into 120 g of water at 20oC to raise the temperature to 40oC?
Give scientific reasons for the following:
Sand mixed with salt is often spread over the icy roads in winter.
What mass of ice at 0°C will be required to cool 0.9 kg of water from 35°C to 0°C? Assume all the ice used melts. The specific heat capacity of water is 4.2 x 103 J/kgoC and specific latent heat of fusion of ice is 336 x 103 J/kg.
Fill in the following blank using suitable word:
Evaporation causes ..........
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.)
