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प्रश्न
How will you prove experimentally that different substances have different specific heat capacities?
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उत्तर
Experiment to prove different substances have different specific heat capacities:
- Take three balls of iron, copper, and lead of equal mass and put them in boiling water for some time. Then, take them out of the water and measure their temperature.
- All of them will be at temperature 100oC. Now, put them immediately on the thick slab of wax. Note the depth that each of the balls goes into the wax. The ball which absorbs more heat from the water will give more heat to wax. More wax will thus melt and the ball will go deeper into the wax. It will be observed that the iron ball goes deepest into the wax. The lead ball goes the least and the copper ball goes to intermediate depth. This shows that for the equal rise in temperature, the three balls have absorbed different amounts of heat.
- This means that the property which determines the amount of heat absorbed by a ball is different for the three balls. This property is called the specific heat capacity.
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संबंधित प्रश्न
In an experiment on the specific heat of a metal, a 0.20 kg block of the metal at 150 °C is dropped in a copper calorimeter (of water equivalent 0.025 kg) containing 150 cm3 of water at 27 °C. The final temperature is 40 °C. Compute the specific heat of the metal. If heat losses to the surroundings are not negligible, is your answer greater or smaller than the actual value for the specific heat of the metal?
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Specific heat capacity
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| Column ‘A’ | Column ‘B’ |
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| (b) kg/m3 | |
| (c) calorie |
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