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प्रश्न
How will you prove experimentally that different substances have different specific heat capacities?
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
Define heat capacity and state its SI unit.
What do you understand by the following statements:
The specific heat capacity of lead is 130 Jkg-1K-1.
50 g of metal piece at 27°C requires 2400 J of heat energy so as to attain a temperature of 327°C . Calculate the specific heat capacity of the metal.
Two metallic blocks P and Q of masses in ratio 2: 1 are given the same amount of heat. If their temperature rise by the same amount, compare their specific heat capacities.
Give three reasons for the increase of green house gases.
What impact will climate changes have on the crops of food?
How will global warming disturb the ecological balance?
A liquid X has specific heat capacity higher than the liquid Y. Which liquid is useful as coolant in car radiators.
Write the approximate values of the specific latent heat of fusion of ice.
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.
Answer the following question.
Why do we generally consider two specific heats of a gas?
A monoatomic gas of pressure 'P' having volume 'V' expands isothermally to a volume '2V' and then adiabatically to a volume '16V'. The final pressure of the gas is ______.
(ratio of specific heats = `5/3`)
The value of 'γ' for a gas is given as `gamma = 1 + 2/"f"`, where 'f ' is the number of degrees of freedom of freedom of a molecule of a gas. What is the ratio of `gamma_"monoatonic"//gamma_"diatomic"`?
Diatomic gas consists of rigid gas molecules
The molar specific heat of an ideal gas at constant pressure and constant volume is 'Cp' and 'Cv' respectively. If 'R' is the universal gas constant and the ratio 'Cp' to 'Cv' is 'γ' then CV = ______.
The specific heat capacity of water is ______.
We would like to make a vessel whose volume does not change with temperature (take a hint from the problem above). We can use brass and iron `(β_(vbrass) = (6 xx 10^(–5))/K and β_(viron) = (3.55 xx 10^(–5))/K)` to create a volume of 100 cc. How do you think you can achieve this.
The difference between the two molar specific heats of gas is 9000 J/kg K. If the ratio of the two specific heats is 1.5, calculate the two molar specific heats.
