Advertisements
Advertisements
प्रश्न
Explain, why temperature in hot summer, falls sharply after a sharp shower?
Advertisements
उत्तर
Water has the highest specific heat capacity of 4.2 Jg-1 °C-1. Thus, when there is a sharp shower, the water evaporates. In doing so, it absorbs a large amount of heat from surroundings, hence temperature falls sharply.
संबंधित प्रश्न
Water is used in hot water bottles for fomentation. Give a reason.
What are other units of heat? Name and define them.
Explain, why is water sprayed on roads in evening in hot summer?
Explain, why do sandy soils, get heated up quickly as compared to wet soils?
Derive an expression for finding out the specific heat capacity of a body (solid) from the readings of an experiment given below:
(i) Mass of empty calorimeter (with stirrer) = m1 gm
(ii) Mass of the metal piece = M gm
(iii) Mass of colorimeter and water = m2 gm
(iv) Initial temperature and water = t1°C
(v) Temperature of hot solid (metal piece) = t2 °C
(vi) Final temperature of the mixture = t°C
(vii) Specific heat of calorimeter = 0.4 J gm / °C
The SI unit of specific heat is _______.
Explain how heat capacity of a solid can be determined by the method of mixture.
The diagram below shows a cooling curve for 200 g of water. The heat is extracted at the rate of 100 Js-1. Answer the questions that follow:

- Calculate specific heat capacity of water.
- Heat released in the region BC.
What is the amount of heat required to raise the temperature of 5 kg of iron from 30°C to 130°C? Specific heat capacity of iron = 483 Jkg-1C-1.
Which method is used to determine the specific heat capacity of both solids and liquids by mixing a substance of unknown specific heat with water?
