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प्रश्न
When we stir a liquid vigorously, it becomes warm. Is it a reversible process?
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उत्तर
When we stir a liquid vigorously, we do work on it due to which its temperature rises and it becomes warm. To bring back the liquid to the initial temperature, heat needs to be extracted from it. But it is an irreversible process that cannot be brought back to the initial state by stirring the liquid again in the opposite direction.
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Reversible and Irreversible Processes
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संबंधित प्रश्न
Which of the processes described below are irreversible?
- The increase in temprature of an iron rod by hammering it.
- A gas in a small cantainer at a temprature T1 is brought in contact with a big reservoir at a higher temprature T2 which increases the temprature of the gas.
- A quasi-static isothermal expansion of an ideal gas in cylinder fitted with a frictionless piston.
- An ideal gas is enclosed in a piston cylinder arrangement with adiabatic walls. A weight W is added to the piston, resulting in compression of gas.
Match List I with List II
| List - I | List - II |
| (a) Isothermal | (i) Pressrue constant |
| (b) Isochoric | (ii) Temperature constant |
| (c) Adiabatic | (iii) Volume constant |
| (d) Isobaric | (iv) Heat content is constant |
Choose the correct answer from the options given below:
