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प्रश्न
What do you understand by the following statements:
The specific heat capacity of lead is 130 Jkg-1K-1.
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उत्तर
Specific heat capacity is the amount of heat energy required to raise the temperature of unit mass of a substance through 1°C or 1 K. Thus, 130 Jkg-1K-1 of heat energy required to raise the temperature of unit mass of lead through 1 K.
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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?
A liquid X has the maximum specific heat capacity and is used as a coolant in Car Radiators. Name the liquid X.
Write the approximate value of specific heat capacity of water in S.I. unit.
Water is used in hot water bottles for fomentation. Give a reason.
Explain the term boiling point ?
Study the following procedure and answer the questions below:
1. Take 3 spheres of iron, copper and lead of equal mass.
2. Put all the 3 spheres in boiling water in a beaker for some time.
3. Take 3 spheres out of the water. Put them immediately on a thick slab of wax.
4. Note, the depth that each sphere goes into the wax.
i) Which property of substance can be studied with this procedure?
ii) Describe that property in minimum words.
iii) Explain the rule of heat exchange with this property.
Will the value of specific heat’capacity and specific latent heat of a substance change if the scale is °F instead of °C?
Consider the statement given below and choose the correct option.
Assertion: Radiation is a form of heat transfer which takes place only in vacuum.
Reason: The thermal energy is transferred from one part of a substance to another part without the actual movement of the atoms or molecules.
Which of the substances P, Q, or R has the lowest specific heat? The temperature v/s time graph is shown ______.
Why is water used as a coolant in radiators of a car?
