The temperature of a gas increases during an adiabatic compression. This is because:
Correct answer: B. Work is done on the gas
- A. Heat is added to the system
- B. Work is done on the gas
- C. Volume remains constant
- D. Pressure decreases
Explanation
In adiabatic compression, no heat is exchanged (Q = 0), and work is done on the gas, increasing its internal energy (ΔU = - W), which raises the 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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