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प्रश्न
A certain amount of heat Q will warm 1 g of material X by 3°C and 1 g of material Y by 4°C. Which material has a higher specific heat capacity?
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उत्तर
We know that heat Q warms 1 g of material X by 3°C. Therefore, substituting these values in a specific heat formula, we get:
Q = 1 × Cx × 3 ...(1)
Similarly, heat Q warms 1 g of material Y by 4°C, therefore
Q = 1 × Cx × 4 ...(2)
As the same heat Q is provided to both materials, the left-hand side of equations (1) and (2) are the same. Hence, on comparing the right-hand sides, we get,
3Cx = 4Cy
Cx = `4/3`Cy and
Cy = `3/4`Cx
Hence, material X has greater specific heat than material Y. It is because its temperature rises less than Y for the mass amount of heat.
संबंधित प्रश्न
Define heat capacity and state its SI unit.
What do you understand by the following statements:
The heat capacity of the body is 60JK-1.
A refrigerator converts 100 g of water at 20°C to ice at -10°C in 35 minutes. Calculate the average rate of heat extraction in terms of watts.
Given: Specific heat capacity of ice = 2.1 J g-1°C-1
Specific heat capacity of water = 4.2 J g-1°C-1
Specific latent heat of fusion of ice = 336 J g-1
Explain the term boiling ?
What is meant by global warming?
Without green house effect, the average temperature of earth’s surface would have been:
(a) – 18℃
(b) 33℃
(c) 0℃
(d) 15℃
The substances like water which have ........... Heat capacity warm up more slowly than substances like iron which have .......... heat capacity.
Solve the following problem.
What is the specific heat of metal if 50 cal of heat is needed to raise 6 kg of the metal from 20°C to 62 °C?
How much heat energy is necessary to raise the temperature of 5 kg of water from 20°C to 100°C?
The specific heat capacity of water is 1 cal/g °C.
