Question

The vapour pressure of an ideal solution is given by"

A) P = P°
B) P = Σx_iP°_i
C) P = ΣP°_i
D) P = P°e^(Σxi)

Answer 1

The vapor pressure of an ideal solution can be calculated using Raoult's law. Raoult's law states that the partial pressure exerted by any component of an ideal solution is equal to the vapor pressure of the pure component multiplied by its mole fraction in the solution. The total vapor pressure exerted by a solution containing multiple components is the sum of the partial pressures of each component.

Step-by-step explanation:

The vapor pressure of an ideal solution can be calculated using Raoult's law. According to Raoult's law, the partial pressure exerted by any component of an ideal solution is equal to the vapor pressure of the pure component multiplied by its mole fraction in the solution. The total vapor pressure exerted by a solution containing multiple components is the sum of the partial pressures of each component.

For example, in a two-component system, the total vapor pressure (Ptot) can be calculated using the formula: Ptot = x1P1 + (1-x1)P2, where x1 represents the mole fraction of one component, and P1 and P2 are the vapor pressures of the pure components.

This relationship between vapor pressures and mole fractions is described by Raoult's law, which is applicable to ideal solutions.