When a gas is expanded at constant temperature then it
Correct answer: A. Absorbs heat
- A. Absorbs heat
- B. Releases heat
- C. Neither absorbs nor releases heat
- D. None of the given options
Explanation
For isothermal expansion of an ideal gas, work is done by the system, and to keep the temperature constant, heat must be absorbed.
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About First Law of Thermodynamics
The first law relates heat supplied, work done and the change in internal energy through energy conservation. Problems use sign conventions and apply the law to isothermal, adiabatic, isobaric and isochoric processes. Internal energy is a state function, while heat and work depend on the path followed.
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