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प्रश्न
Two metals A and B have specific heat capacities in the ratio 2:3. If they are supplied same amount of heat then
If specific heat capacity of metal A is 0.26 Jg-1 0C-1 then calculate the specific heat capacity of metal B.
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उत्तर
It is given that, ratio of specific heat capacities, `"C"_"A"/"C"_"B" = 2/3` and `"C"_"A" = 0.26`
Calculating we get, CB = 1.5 × 0.26 = 0.39.
Therefore, specific heat capacity of metal B is 0.39 Jg-1°C-1.
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संबंधित प्रश्न
What do you understand by the following statements:
The heat capacity of the body is 60JK-1.
Write the approximate value of specific heat capacity of water in S.I. unit.
Water property of water makes it an effective coolant?
Explain the term boiling ?
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.
Explain, Why is it advisabile to pour cold water over burns, caused on human body, by hot solids?
Is it possible to condense the water formed, back to ice by adding ice at 0°C. Explain with reason.
Explain how heat capacity of a solid can be determined by the method of mixture.
Read the passage and answer the questions based on it.
If heat is exchanged between a hot and cold object, the temperature of the cold object goes on increasing due to gain of energy and the temperature of the hot object goes on decreasing due to loss of energy. The change in temperature continues till the temperatures of both objects attain the same value. In this process, the cold object gains heat energy and the hot object loses heat energy. If the system of both the objects is isolated from the environment by keeping it inside a heat-resistant box then no energy can flow from inside the box or come into the box. In this situation, we get the following principle.
Heat energy lost by the hot object = Heat energy gained by the cold object. This is called the ‘Principle of heat exchange’.
- Where does heat transfer take place?
- In such a situation which principle of heat do you perceive?
- How can this principle be explained in short?
- Which property of the substance is measured using this principle?
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).
