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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. Check FAQs
α=PaSatPbSat
α - Relative Volatility?PaSat - Saturated Vapour Pressure of More Volatile Comp?PbSat - Saturated Vapour Pressure of Less Volatile Comp?

Relative Volatility using Vapour Pressure Example

With values
With units
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Here is how the Relative Volatility using Vapour Pressure equation looks like with Values.

Here is how the Relative Volatility using Vapour Pressure equation looks like with Units.

Here is how the Relative Volatility using Vapour Pressure equation looks like.

0.6667Edit=10Edit15Edit
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Relative Volatility using Vapour Pressure Solution

Follow our step by step solution on how to calculate Relative Volatility using Vapour Pressure?

FIRST Step Consider the formula
α=PaSatPbSat
Next Step Substitute values of Variables
α=10Pa15Pa
Next Step Prepare to Evaluate
α=1015
Next Step Evaluate
α=0.666666666666667
LAST Step Rounding Answer
α=0.6667

Relative Volatility using Vapour Pressure Formula Elements

Variables
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.
Symbol: α
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Saturated Vapour Pressure of More Volatile Comp
Saturated Vapour Pressure of More Volatile Component is the pressure at which water vapour is in thermodynamic equilibrium with its condensed state.
Symbol: PaSat
Measurement: PressureUnit: Pa
Note: Value should be greater than 0.
Saturated Vapour Pressure of Less Volatile Comp
Saturated Vapour Pressure of Less Volatile Comp is the pressure at which water vapour is in thermodynamic equilibrium with its condensed state.
Symbol: PbSat
Measurement: PressureUnit: Pa
Note: Value should be greater than 0.

Other Formulas to find Relative Volatility

​Go Relative Volatility using Equilibrium Vaporization Ratio
α=KMVCKLVC
​Go Relative Volatility using Mole Fraction
α=yGas1-yGasxLiquid1-xLiquid

Other formulas in Relative Volatility and Vaporization Ratio category

​Go Boil-Up Ratio
Rv=VW
​Go External Reflux Ratio
R=L0D
​Go Feed Q-Value in Distillation Column
q=Hv-fλ
​Go Internal Reflux Ratio
RInternal=LD

How to Evaluate Relative Volatility using Vapour Pressure?

Relative Volatility using Vapour Pressure evaluator uses Relative Volatility = Saturated Vapour Pressure of More Volatile Comp/Saturated Vapour Pressure of Less Volatile Comp to evaluate 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 evaluate Relative Volatility using Vapour Pressure using this online evaluator? To use this online evaluator for Relative Volatility using Vapour Pressure, enter Saturated Vapour Pressure of More Volatile Comp (PaSat) & Saturated Vapour Pressure of Less Volatile Comp (PbSat) and hit the calculate button.

FAQs on Relative Volatility using Vapour Pressure

What is the formula to find Relative Volatility using Vapour Pressure?
The formula of Relative Volatility using Vapour Pressure is expressed as Relative Volatility = Saturated Vapour Pressure of More Volatile Comp/Saturated Vapour Pressure of Less Volatile Comp. Here is an example- 0.666667 = 10/15.
How to calculate Relative Volatility using Vapour Pressure?
With Saturated Vapour Pressure of More Volatile Comp (PaSat) & Saturated Vapour Pressure of Less Volatile Comp (PbSat) we can find Relative Volatility using Vapour Pressure using the formula - Relative Volatility = Saturated Vapour Pressure of More Volatile Comp/Saturated Vapour Pressure of Less Volatile Comp.
What are the other ways to Calculate Relative Volatility?
Here are the different ways to Calculate Relative Volatility-
  • Relative Volatility=Equilibrium Vaporization Ratio of MVC/Equilibrium Vaporization Ratio of LVCOpenImg
  • 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))OpenImg
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