For an ideal gas undergoing adiabatic expansion, the relation between pressure and volume is:
Correct answer: C. PVᵞ = constant
- A. PV = constant
- B. P/V = constant
- C. PVᵞ = constant
- D. PᵞV = constant
Explanation
In an adiabatic process, the relation for an ideal gas is PV^γ = constant, where γ is the ratio of specific heats (Cp/Cv), distinguishing it from isothermal (PV = constant) processes.
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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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