Q.

A sample of a liquid is kept at 1 atm. It is compressed to 5 atm which leads to change of volume of 0.8 cm3. If the bulk modulus of the liquid is 2 GPa, the initial volume of the liquid was ______ litre. (Take 1 atm = 105Pa)          [2025]


Ans.

(4)

Given, Initial pressure of liquid (Pi) = 1 atm Final pressure of liquid (Pf) = 5 atm.

Change in pressure (dP) = PfPi= 4 atm = 4×105Pa

Change in volume (dV) = – 0.8 cm3

Bulk modulus (B) = 2×109Pa

Now, B=dP(dV/V)  V=B(dVdP)

 V=2×109×(0.8×106)4×105

               =4×103m3=4 litre