Problem 2.188

A volume occupied by a saturated vapour is reduced isothermally \(n\) -fold. Find what fraction \(\eta\) of the final volume is occupied by the liquid phase if the specific volumes of the saturated vapour and the liquid phase differ by \(N\) times \((N>n)\). Solve the same problem under the condition that the final volume of the substance corresponds to the midpoint of a horizontal portion of the isothermal line in the diagram \(p, V\).