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प्रश्न
Water property of water makes it an effective coolant?
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उत्तर
By allowing water to flow in pipes around the heated parts of a machine, heat energy from such part is removed. Water in pipes extracts more heat from surrounding without much rise in its temperature because of its large specific heat capacity. So, Water is used as an effective coolant.
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?
Give a mathematical relation between Heat Capacity and Specific Heat Capacity.
Differentiate between heat capacity and specific heat capacity.
Describe a method to determine the specific heat capacity of a solid, like a piece of copper ?
Find the time taken by a 500 W heater to raise the temperature of 50 kg of material of specific heat capacity 960 J kg-1K-1, from 18°C to 38° C. Assume that all the heat energy supplied by the heater is given to the material.
Water boils at 120 °C in a pressure cooker. Explain the reason.
Does the specific heat capacity of a substance depend upon its mass and rise in temperature only?
Write a short note.
Specific heat capacity
J/Kg °C is the unit of specific heat capacity.
Prove the Mayer's relation `C_p - C _v = R/J`
