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प्रश्न
If, in a central heating system, steam enters a radiation pipe at 100°C and water leaves the radiation pipe at 100°C, can this radiation pipe heat a room? Give an explanation for your answer.
उत्तर
Yes, because steam at 100°C gives out its latent heat of vaporisation to condense to water ut the same temperature of 100°C.
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संबंधित प्रश्न
State two factors upon which the heat absorbed by a body depends
Name the S.I. unit of heat.
Differentiate between heat capacity and specific heat capacity.
How will you prove experimentally that different substances have different specific heat capacities?
Is it possible to condense the water formed, back to ice by adding ice at 0°C. Explain with reason.
Numerical Problem.
How much heat energy is required to change 2 kg of ice at 0°C into water at 20°C? (Specific latent heat of fusion of water = 3,34,000 J/kg, Specific heat capacity of water = 4200 JKg–1K–1).
Match the following:
| Column A | Column B | ||
| 1. | Specific heat capacity of water | a. | 0°C |
| 2. | Latent heat of fusion of ice | b. | 2260 J/g |
| 3. | Latent heat of vaporization of water | c. | 100°C |
| 4. | The melting point of iced | d. | 4.2 J/g°C |
| 5. | The boiling point of water | e. | 336 J/g |
A metal ball of heat capacity 50J/°C loses 2000 J of heat. By how much will its temperature fall?
Give one example where high specific heat capacity of water is used as heat reservoir.
