Question

17. If a system undergoes contraction of volume then the work done by the system will be: a) Zero b)Negligible c) negative positive​

Answer 1

Answer:

a)zero I think it is the correct answer

Answer 2

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.