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प्रश्न
Find the odd one out:
पर्याय
Conduction
Convection
Radiation
Expansion
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उत्तर
Expansion
Explanation:
Conduction, convection, and radiation are all ways of heat transport, whereas material expansion is a property.
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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?
Give a mathematical relation between Heat Capacity and Specific Heat Capacity.
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.
Give three reasons for the increase of green house gases.
What impact will global warming have on the health of the affected population?
What change in heat energy occurs when lead at its melting point
solidifies without change in the temperature?
State, with reason, which of the two, boiling water or steam both at 100°C will produce more severe burns.
Fill in the following blank using suitable word:
SI unit of heat is .........
A piece of iron of mass 2.0 kg has a heat capacity of 966 J K-1. Find its specific heat capacity in S.I unit.
The farmers fill their fields with water in winter. Give reason.
Why is specific heat capacity taken as a measure of thermal inertia?
Explain, why is water sprayed on roads in evening in hot summer?
Explain, why water is considered as best liquid for quenching thirst?
Is it possible to condense the water formed, back to ice by adding ice at 0°C. Explain with reason.
Write an expression for the heat energy liberated by a hot body.
63.2 g of copper at 50°C can just melt 3.8g of ice. If the specific latent heat of ice is 336 J/g, find the specific heat capacity of copper.
A vessel of negligible heat*capacity contains 40g of ice in it at 0°C, 8g of steam at 100°C is passed into the ice to melt it. Find the final temperature of the contents of the vessel.
(Specific latent heat of vaporization of steam = 2268 J/g, specific latent heat of fusion of ice = 336 J/f and specific heat capacity of water = 4.2 J/g°C)
Solve the following problem.
Specific latent heat of vaporization of water is 2.26 × 106 J/kg. Calculate the energy needed to change 5.0 g of water into steam at 100 ºC.
How much heat energy is necessary to raise the temperature of 5 kg of water from 20°C to 100°C?
Explain why the specific heat capacity at constant pressure is greater than the specific heat capacity at constant volume.
