The internal energy of an ideal gas depends upon only:
Correct answer: C. Temperature
- A. Pressure
- B. Volume
- C. Temperature
- D. All of these
Explanation
For an ideal gas, there are no intermolecular forces, so its internal energy consists only of the kinetic energy of its molecules. Since the average kinetic energy of gas molecules is directly proportional to the absolute temperature, internal energy depends only on temperature.
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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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