Question

50 L of a certain liquid is confined in a piston system at the external pressure 100 atm. This pressure is suddenly released and liquid is expanded against the constant atmospheric pressure, volume of the liquid increases by 1 L and the final pressure on the liquid is 10 atm. Find the work done.

• A. 1 L.atm
• B. 5 L.atm
• C. 500 L.atm
• D. 501 L.atm

Answer 1

Answer: (A)

1 L.atm

The external pressure= $100atm$

Change in volume= $51-50=1L$

Work done for constant pressure= $P\Delta V=100\times 1=100J$

$\Rightarrow 1Latm=100J$

Hence work done= $1Latm$