Question

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

• A. 1 L.atm
• B. 5 L.atm
• C. 500 L.atm
• D. 50 L.atm

Answer 1

The correct option is A 1 L.atm

The external pressure $\left(P\right)=100atm$

Change in Volume $\left(\Delta V\right)=51-50=1L$

We know that,

Work done for constant pressure$=P\Delta V$

$=100\times 1=100J$

$=100J\approx 1Latm$

Hence, this is the required result.