17. If a system undergoes contraction of volume then the work done by the system will be: a) Zero b)Negligible c) negative positive
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a)zero I think it is the correct answer
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The work done by the system will be negative.
- Let the initial volume of the system be V₁ and final volume be V₂.
- We consider the pressure of the system to be constant.
- We know that, work done by system is given by,
Work done = Pressure × Change in volume
= Pressure × ( Final volume - Initial volume )
∴ W = P ( V₂ - V₁ )
- We are given that the system undergoes contraction.
- This means that V₂ will be less than V₁.
- Hence, ( V₂ - V₁ ) will be negative.
- Therefore, the work done by the system will be negative.
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