Relative Volatility using Vapour Pressure Calculator

✖Saturated Vapour Pressure of More Volatile Component is the pressure at which water vapour is in thermodynamic equilibrium with its condensed state.ⓘ Saturated Vapour Pressure of More Volatile Comp [Pa^Sat]			+10% -10%
✖Saturated Vapour Pressure of Less Volatile Comp is the pressure at which water vapour is in thermodynamic equilibrium with its condensed state.ⓘ Saturated Vapour Pressure of Less Volatile Comp [Pb^Sat]			+10% -10%

✖Relative Volatility is a measure comparing the vapor pressures of the components in a liquid mixture of chemicals. This quantity is widely used in designing large industrial distillation processes.ⓘ Relative Volatility using Vapour Pressure [α]

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Formula

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Relative Volatility using Vapour Pressure

Formula

`"α" = "Pa"^{"Sat"}/"Pb"^{"Sat"}`

Example

`"0.666667"="10Pa"/"15Pa"`

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Relative Volatility using Vapour Pressure Solution

STEP 0: Pre-Calculation Summary

Formula Used

Relative Volatility = Saturated Vapour Pressure of More Volatile Comp/Saturated Vapour Pressure of Less Volatile Comp
α = Pa^Sat/Pb^Sat
This formula uses 3 Variables

Variables Used

Relative Volatility - Relative Volatility is a measure comparing the vapor pressures of the components in a liquid mixture of chemicals. This quantity is widely used in designing large industrial distillation processes.
Saturated Vapour Pressure of More Volatile Comp - (Measured in Pascal) - Saturated Vapour Pressure of More Volatile Component is the pressure at which water vapour is in thermodynamic equilibrium with its condensed state.
Saturated Vapour Pressure of Less Volatile Comp - (Measured in Pascal) - Saturated Vapour Pressure of Less Volatile Comp is the pressure at which water vapour is in thermodynamic equilibrium with its condensed state.

STEP 1: Convert Input(s) to Base Unit

Saturated Vapour Pressure of More Volatile Comp: 10 Pascal --> 10 Pascal No Conversion Required
Saturated Vapour Pressure of Less Volatile Comp: 15 Pascal --> 15 Pascal No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

α = Pa^Sat/Pb^Sat --> 10/15

Evaluating ... ...

α = 0.666666666666667

STEP 3: Convert Result to Output's Unit

0.666666666666667 --> No Conversion Required

FINAL ANSWER

0.666666666666667 ≈ 0.666667 <-- Relative Volatility

(Calculation completed in 00.004 seconds)

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Home » Engineering » Chemical Engineering » Mass Transfer Operations » Distillation » Relative Volatility & Vaporization Ratio » Relative Volatility using Vapour Pressure

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Created by Ayush gupta

University School of Chemical Technology-USCT (GGSIPU), New Delhi

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< 10+ Relative Volatility & Vaporization Ratio Calculators

Relative Volatility using Mole Fraction

Go Relative Volatility = (Mole Fraction of Component in Vapor Phase/(1-Mole Fraction of Component in Vapor Phase))/(Mole Fraction of Component in Liquid Phase/(1-Mole Fraction of Component in Liquid Phase))

Total Pressure using Mole Fraction and Saturated Pressure

Go Total Pressure of Gas = (Mole Fraction of MVC in Liq Phase*Partial Pressure of More Volatile Component)+((1-Mole Fraction of MVC in Liq Phase)*Partial Pressure of Less Volatile Component)

Relative Volatility using Vapour Pressure

Go Relative Volatility = Saturated Vapour Pressure of More Volatile Comp/Saturated Vapour Pressure of Less Volatile Comp

Mole Fraction of MVC in Liquid using Equilibrium Vaporization Ratio

Go Mole Fraction of MVC in Liquid Phase = Mole Fraction of MVC in Vapor Phase/Equilibrium Vaporization Ratio of MVC

Mole Fraction of LVC in Liquid using Equilibrium Vaporization Ratio

Go Mole Fraction of LVC in Liquid Phase = Mole Fraction of LVC in Vapor Phase/Equilibrium Vaporization Ratio of LVC

Mole Fraction of MVC in Vapor using Equilibrium Vaporization Ratio

Go Mole Fraction of MVC in Vapor Phase = Equilibrium Vaporization Ratio of MVC*Mole Fraction of MVC in Liquid Phase

Mole Fraction of LVC in Vapor using Equilibrium Vaporization Ratio

Go Mole Fraction of LVC in Vapor Phase = Equilibrium Vaporization Ratio of LVC*Mole Fraction of LVC in Liquid Phase

Equilibrium Vaporization Ratio for More Volatile Component

Go Equilibrium Vaporization Ratio of MVC = Mole Fraction of MVC in Vapor Phase/Mole Fraction of MVC in Liquid Phase

Equilibrium Vaporization Ratio for Less Volatile Component

Go Equilibrium Vaporization Ratio of LVC = Mole Fraction of LVC in Vapor Phase/Mole Fraction of LVC in Liquid Phase

Relative Volatility using Equilibrium Vaporization Ratio

Go Relative Volatility = Equilibrium Vaporization Ratio of MVC/Equilibrium Vaporization Ratio of LVC

< 20 Important Formulas in Distillation Mass Transfer Operation Calculators

Total Steam Required to Vaporize Volatile Component

Go Total Steam Required to Vaporize Volatile Comp = (((Total Pressure of System/(Vaporizing Efficiency*Vapor Pressure of Volatile Component))-1)*(Initial Moles of Volatile Component-Final Moles of Volatile Component))+((Total Pressure of System*Moles of Non-Volatile Component/(Vaporizing Efficiency*Vapor Pressure of Volatile Component))*ln(Initial Moles of Volatile Component/Final Moles of Volatile Component))

Moles of Volatile component Volatilized from mixture of Non-Volatiles by Steam

Go Moles of Volatile Component = Moles of Steam*((Vaporizing Efficiency*Mole Fraction of Volatile Comp in Non-Volatiles*Vapor Pressure of Volatile Component)/(Total Pressure of System-Vaporizing Efficiency*Mole Fraction of Volatile Comp in Non-Volatiles*Vapor Pressure of Volatile Component))

Minimum Number of Distillation Stages by Fenske's Equation

Go Minimum Number of Stages = ((log10((Mole Fraction of More Volatile Comp in Distillate*(1-Mole Fraction of More Volatile Comp in Residue))/(Mole Fraction of More Volatile Comp in Residue*(1-Mole Fraction of More Volatile Comp in Distillate))))/(log10(Average Relative Volatility)))-1

Mole Fraction of MVC in Feed from Overall and Component Material Balance in Distillation

Go Mole Fraction of More Volatile Component in Feed = (Distillate Flowrate*Mole Fraction of More Volatile Comp in Distillate+Residue Flowrate from Distillation Column*Mole Fraction of More Volatile Comp in Residue)/(Distillate Flowrate+Residue Flowrate from Distillation Column)

Moles of Volatile component Volatilized from mixture of Non-Volatiles by Steam at Equilibrium

Go Moles of Volatile Component = Moles of Steam*(Mole Fraction of Volatile Comp in Non-Volatiles*Vapor Pressure of Volatile Component/(Total Pressure of System-Mole Fraction of Volatile Comp in Non-Volatiles*Vapor Pressure of Volatile Component))

Moles of Volatile component Volatilized by Steam with Trace amounts of Non-Volatiles

Go Moles of Volatile Component = Moles of Steam*((Vaporizing Efficiency*Vapor Pressure of Volatile Component)/(Total Pressure of System-(Vaporizing Efficiency*Vapor Pressure of Volatile Component)))

Murphree Efficiency of Distillation Column Based on Vapour Phase

Go Murphree Efficiency of Distillation Column = ((Average Mole Fraction of Vapour on Nth Plate-Average Mole Fraction of Vapour at N+1 Plate)/(Average Mole Fraction at Equilibrium on Nth Plate-Average Mole Fraction of Vapour at N+1 Plate))*100

Relative Volatility using Mole Fraction

Total Pressure using Mole Fraction and Saturated Pressure

Go Total Pressure of Gas = (Mole Fraction of MVC in Liq Phase*Partial Pressure of More Volatile Component)+((1-Mole Fraction of MVC in Liq Phase)*Partial Pressure of Less Volatile Component)

Moles of Volatile component Volatilized by Steam with Trace amounts of Non-Volatiles at Equilibrium

Go Moles of Volatile Component = Moles of Steam*(Vapor Pressure of Volatile Component/(Total Pressure of System-Vapor Pressure of Volatile Component))

Feed Q-Value in Distillation Column

Go Q-value in Mass Transfer = Heat Required to Convert Feed to Saturated Vapor/Molal Latent Heat of Vaporization of Saturated Liq

Relative Volatility using Vapour Pressure

Go Relative Volatility = Saturated Vapour Pressure of More Volatile Comp/Saturated Vapour Pressure of Less Volatile Comp

External Reflux Ratio

Go External Reflux Ratio = External Reflux Flowrate to Distillation Column/Distillate Flowrate from Distillation Column

Internal Reflux Ratio

Go Internal Reflux Ratio = Internal Reflux Flowrate to Distillation Column/Distillate Flowrate from Distillation Column

Equilibrium Vaporization Ratio for Less Volatile Component

Go Equilibrium Vaporization Ratio of LVC = Mole Fraction of LVC in Vapor Phase/Mole Fraction of LVC in Liquid Phase

Equilibrium Vaporization Ratio for More Volatile Component

Go Equilibrium Vaporization Ratio of MVC = Mole Fraction of MVC in Vapor Phase/Mole Fraction of MVC in Liquid Phase

Boil-Up Ratio

Go Boil-Up Ratio = Boil-Up Flowrate to the Distillation Column/Residue Flowrate from Distillation Column

Total Feed Flowrate of Distillation Column from Overall Material Balance

Go Feed Flowrate to Distillation Column = Distillate Flowrate+Residue Flowrate from Distillation Column

Relative Volatility using Equilibrium Vaporization Ratio

Go Relative Volatility = Equilibrium Vaporization Ratio of MVC/Equilibrium Vaporization Ratio of LVC

Overall Efficiency of Distillation Column

Go Overall Efficiency of Distillation Column = (Ideal Number of Plates/Actual Number of Plates)*100

Relative Volatility using Vapour Pressure Formula

Relative Volatility = Saturated Vapour Pressure of More Volatile Comp/Saturated Vapour Pressure of Less Volatile Comp
α = Pa^Sat/Pb^Sat

What is Relative Volatility?

Relative volatility is a measure comparing the vapor pressures of the components in a liquid mixture of chemicals. It indicates the ease or difficulty of using distillation to separate the more volatile components from the less volatile components in a mixture.

What is Partial Pressure?

The pressure that would be exerted by one of the gases in a mixture if it occupied the same volume on its own. In simple words Partial pressure is the pressure that an individual gas exerts in a mixture of gases.

How to Calculate Relative Volatility using Vapour Pressure?

Relative Volatility using Vapour Pressure calculator uses Relative Volatility = Saturated Vapour Pressure of More Volatile Comp/Saturated Vapour Pressure of Less Volatile Comp to calculate the Relative Volatility, The Relative Volatility using Vapour pressure formula is defined as the ratio of vapor pressures of more and less volatile components in a mixture. This quantity is widely used in designing large industrial distillation processes. Relative Volatility is denoted by α symbol.

How to calculate Relative Volatility using Vapour Pressure using this online calculator? To use this online calculator for Relative Volatility using Vapour Pressure, enter Saturated Vapour Pressure of More Volatile Comp (Pa^Sat) & Saturated Vapour Pressure of Less Volatile Comp (Pb^Sat) and hit the calculate button. Here is how the Relative Volatility using Vapour Pressure calculation can be explained with given input values -> 0.666667 = 10/15.

FAQ

What is Relative Volatility using Vapour Pressure?

The Relative Volatility using Vapour pressure formula is defined as the ratio of vapor pressures of more and less volatile components in a mixture. This quantity is widely used in designing large industrial distillation processes and is represented as α = Pa^Sat/Pb^Sat or Relative Volatility = Saturated Vapour Pressure of More Volatile Comp/Saturated Vapour Pressure of Less Volatile Comp. Saturated Vapour Pressure of More Volatile Component is the pressure at which water vapour is in thermodynamic equilibrium with its condensed state & Saturated Vapour Pressure of Less Volatile Comp is the pressure at which water vapour is in thermodynamic equilibrium with its condensed state.

How to calculate Relative Volatility using Vapour Pressure?

The Relative Volatility using Vapour pressure formula is defined as the ratio of vapor pressures of more and less volatile components in a mixture. This quantity is widely used in designing large industrial distillation processes is calculated using Relative Volatility = Saturated Vapour Pressure of More Volatile Comp/Saturated Vapour Pressure of Less Volatile Comp. To calculate Relative Volatility using Vapour Pressure, you need Saturated Vapour Pressure of More Volatile Comp (Pa^Sat) & Saturated Vapour Pressure of Less Volatile Comp (Pb^Sat). With our tool, you need to enter the respective value for Saturated Vapour Pressure of More Volatile Comp & Saturated Vapour Pressure of Less Volatile Comp and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Relative Volatility?

In this formula, Relative Volatility uses Saturated Vapour Pressure of More Volatile Comp & Saturated Vapour Pressure of Less Volatile Comp. We can use 4 other way(s) to calculate the same, which is/are as follows -

Relative Volatility = (Mole Fraction of Component in Vapor Phase/(1-Mole Fraction of Component in Vapor Phase))/(Mole Fraction of Component in Liquid Phase/(1-Mole Fraction of Component in Liquid Phase))
Relative Volatility = Equilibrium Vaporization Ratio of MVC/Equilibrium Vaporization Ratio of LVC
Relative Volatility = Equilibrium Vaporization Ratio of MVC/Equilibrium Vaporization Ratio of LVC
Relative Volatility = (Mole Fraction of Component in Vapor Phase/(1-Mole Fraction of Component in Vapor Phase))/(Mole Fraction of Component in Liquid Phase/(1-Mole Fraction of Component in Liquid Phase))

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