# How do you calculate mole fraction in vapour phase?

## How do you calculate mole fraction in vapour phase?

Mole fraction of the component A in vapour phase is x1 and mole fraction of component A in liquid mixture is x2 , then ( p0A= vapour pressure of pure A ; p0B= vapour pressure of pure B ), the total pressure of liquid mixture is: (A) p0Ax2x1. (B) p0Ax1x2. (C) p0Bx1x2.

## How do you find the vapor pressure of benzene?

Vapour pressure of a mixture of benzene and toluene is given by P=179XB+92, where XB is the mole fraction of benzene.

How do you find the mole fraction?

Formula Related to the Mole Fraction Consider a solution that consists of two substances A and B, then the mole fraction of each substance is: Mole fraction of solute = (Moles of Solute) / (Total number of moles of the solutes and the solvent).

How do you calculate mole fraction of toluene?

The mole fraction of toluene in the vapour phase is YT. It is given by the expression YT=totalpressurePT=7818.5=0.237.

### How do you calculate combined vapor pressure?

To find the vapor pressure at a given temperature, use the Clausius-Clapeyron equation: ln(P1/P2) = (ΔHvap/R)((1/T2) – (1/T1)). You could also use Raoult’s Law to find the vapor pressure: Psolution=PsolventXsolvent.

### How do you calculate total vapor pressure?

The total vapour pressure (p) is a linear function of the mole fraction xB (or xA as xA =1-xB ) because pA° and pB° are constant at a particular temperature.

How do you calculate mole fraction?

The mole fraction formula for a solution with containing one or more solutes is: Mole fraction of each solute = Number of moles of that solute divided by the total number of moles of all solutes and the solvent.

How do you calculate moles from vapor pressure?

This is done by using Raoult’s law, which states that, for an ideal solution, the partial vapor pressure of a component in that solution is equal to the mole fraction of that component multiplied by its vapor pressure when pure.

#### What is mole fraction class 12?

Class 12 Chemistry Solutions. Mole fraction. Mole fraction. Mole fraction can be defined as the ratio of number of moles of the component in the solution to the total number of moles of all components in the solution.

#### How do you calculate mole fraction in chemistry?

Mole fraction is a unit of concentration, defined to be equal to the number of moles of a component divided by the total number of moles of a solution. Because it is a ratio, mole fraction is a unitless expression. Formula to calculate mole fraction. X is the component that is being identified for mole fraction.

What is the molar fraction of a mixture?

Mole fraction represents the number of molecules of a particular component in a mixture divided by the total number of moles in the given mixture. It’s a way of expressing the concentration of a solution. The molar fraction can be represented by X.

Is the mole fraction dependent on the temperature?

Mole fraction is not dependent on the temperature. The information about the density of the phase is not necessary to calculate the mole fraction. In the case of an ideal gas mixture, the mole fraction is represented by the ratio of partial pressure to total pressure of the mixture. 1.