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प्रश्न
Define heat capacity and state its SI unit.
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उत्तर
Heat capacity of a body is the amount of heat energy required to raise its temperature by 1°C. Its SI unit is JK-1
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संबंधित प्रश्न
Name a liquid which has the highest specific heat capacity.
Describe a method to determine the specific heat capacity of a solid, like a piece of copper ?
Explain the meaning of green house effect.
The specific heat capacity of a body depends on _____________ .
An equal quantity of heat is supplied to two substances A and B. The substance A shows a greater rise in temperature. What can you say about the heat capacity of A as compared to that of B?
Read this activity and answer the following questions.
- Take three spheres of iron, copper and lead. the lead of equal mass.
- Put all the three spheres in boiling water in the beaker for some time.
- Take the three spheres out of the water.
- All the spheres will be at a temperature 100 °C.
- Put them immediately on the thick slab of wax.
- Note, the depth that each of the sphere goes into the wax.
Questions:
- Which property is determined from this activity?
- Give name to that property.
- Explain the term principal of heat exchange with the help of this activity.
An office room contains about 4000 moles of air. The change in the internal energy of this much air when it is cooled from 34° C to 19° C at a constant pressure of 1.0 atm is (Use `gamma_"air"` = 1.4 and Universal gas constant = 8.314 J / mol K) ____________.
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.
Give one example where high specific heat capacity of water is used as heat reservoir.
