For an isothermal process, internal energy
Correct answer: C. Remains the same
- A. Increases
- B. Decreases
- C. Remains the same
- D. Cannot be predicted
Explanation
At constant pressure (isobaric process), the graph between volume (V) and temperature (T) is typically a straight line. This relationship is described by Charles's law, which states that the volume of a gas is directly proportional to its absolute temperature at constant pressure.
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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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