1. The problem statement, all variables and given/known data When pressure is applied to a liquid, its volume decreases. Assuming that the isothermal compressibility κ=-1/V(δV/δP) is independent of pressure, derive an expression for the volume as a function of pressure. 2. Relevant equations 3. The attempt at a solution I don't know where to start, but I know the answer should be V2=V1 exp[-κ(P2-P1)].