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प्रश्न
Explain, why do sandy soils, get heated up quickly as compared to wet soils?
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उत्तर
The specific heat capacity of sand is about five times less than water. Thus,when sun shines equally on sandy soil and wet soil, the sandy soil gets heated up rapidly as compared to wet soil. It is because water absorbs large amount of heat energy, but its temperature does not rise sufficiently.
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संबंधित प्रश्न
Given below are observations on molar specific heats at room temperature of some common gases.
| Gas |
Molar specific heat (Cv) (cal mol–1 K–1) |
| Hydrogen | 4.87 |
| Nitrogen | 4.97 |
| Oxygen | 5.02 |
| Nitric oxide | 4.99 |
| Carbon monoxide | 5.01 |
| Chlorine | 6.17 |
The measured molar specific heats of these gases are markedly different from those for monatomic gases. Typically, molar specific heat of a monatomic gas is 2.92 cal/mol K. Explain this difference. What can you infer from the somewhat larger (than the rest) value for chlorine?
Define heat capacity and state its SI unit.
Name a liquid which has the highest specific heat capacity.
What do you mean by the following statement?
The specific heat capacity of copper is 0. 4 Jg-1 K-1?
How will you prove experimentally that different substances have different specific heat capacities?
How much heat energy is released when 5 g of water at 20° C changes to ice at 0° C?
[Specific heat capacity of water = 4.2 J g-1 ° C-1 Specific latent heat of fusion of ice = 336 J g-1]
How much heat energy is necessary to raise the temperature of 5 kg of water from 20°C to 100°C?
The heat capacity of the vessel of mass 100 kg is 8000 J/°K. Find its specific heat capacity.
A metal ball of heat capacity 50J/°C loses 2000 J of heat. By how much will its temperature fall?
When two kilocalories of heat are supplied to a system, the internal energy of the system increases by 5030 J and the work done by the gas against the external pressure is 3350 J. Calculate J, the mechanical equivalent of heat.
