The work done in an adiabatic process is given by:
Correct answer: B. (P₁V₁ - P₂V₂)/(γ - 1)
- A. nRΔT
- B. (P₁V₁ - P₂V₂)/(γ - 1)
- C. nRT ln(V₂/V₁)
- D. PΔV
Explanation
For an adiabatic process, work done is W = (P₁V₁ - P₂V₂)/(γ - 1), derived from the pressure-volume relationship and the first law, where γ is the ratio of specific heats.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Practise Thermodynamics
714 free Thermodynamics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More First Law of Thermodynamics questions
A system undergoes a cyclic process. The net work done is:
The temperature of an ideal gas increases in an:
What will be the mathematical form of the first law of thermodynamics for a system whose variation of volume by pressure is shown?
The efficiency of a Carnot engine increases when:
The bicycle pump works based on:
According to the first law of thermodynamics, ΔU = Q + W, where ΔU Is the increase in internal energy of the system, Q is the heat transferred to the system and W is the external work done by the system.Which of the following is NOT a correct expression?