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Birla Institute of Technology & Science (BITS), Pilani
Ishan Gupta has created this Calculator and 50+ more calculators!
K J Somaiya College of science (K J Somaiya), Mumbai
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2 Mass Transfer Operations Calculators

Relative Volatility
relative_volatility = if(Vapor Pressure of component A/Mole fraction of component A in liquid phase>Vapor Pressure of component B/Mole fraction of component B in liquid phase) { mole_fraction_a_vapor*(1-Mole fraction of component A in liquid phase)/(Mole fraction of component A in liquid phase*(1-mole_fraction_a_vapor)) } else { mole_fraction_b_vapor*(1-Mole fraction of component B in liquid phase)/(Mole fraction of component B in liquid phase*(1-mole_fraction_b_vapor)) } Go
Partial Pressure (using Raoult's Law)
vapor_pressure_a = Mole fraction of component A in liquid phase*Vapor Pressure of pure component A Go

Relative Volatility Formula

relative_volatility = if(Vapor Pressure of component A/Mole fraction of component A in liquid phase>Vapor Pressure of component B/Mole fraction of component B in liquid phase) { mole_fraction_a_vapor*(1-Mole fraction of component A in liquid phase)/(Mole fraction of component A in liquid phase*(1-mole_fraction_a_vapor)) } else { mole_fraction_b_vapor*(1-Mole fraction of component B in liquid phase)/(Mole fraction of component B in liquid phase*(1-mole_fraction_b_vapor)) }
α = if(PA/xA>PBo/xB) { mole_fraction_a_vapor*(1-xA)/(xA*(1-mole_fraction_a_vapor)) } else { mole_fraction_b_vapor*(1-xB)/(xB*(1-mole_fraction_b_vapor)) }

What is 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.

How to Calculate Relative Volatility?

Relative Volatility calculator uses relative_volatility = if(Vapor Pressure of component A/Mole fraction of component A in liquid phase>Vapor Pressure of component B/Mole fraction of component B in liquid phase) { mole_fraction_a_vapor*(1-Mole fraction of component A in liquid phase)/(Mole fraction of component A in liquid phase*(1-mole_fraction_a_vapor)) } else { mole_fraction_b_vapor*(1-Mole fraction of component B in liquid phase)/(Mole fraction of component B in liquid phase*(1-mole_fraction_b_vapor)) } to calculate the 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. In effect, it indicates the ease or difficulty of using distillation to separate the more volatile components from the less volatile components in a mixture. By convention, relative volatility is usually denoted as α. Relative Volatility and is denoted by α symbol.

How to calculate Relative Volatility using this online calculator? To use this online calculator for Relative Volatility, enter Vapor Pressure of component A (PA), Mole fraction of component A in liquid phase (xA), Vapor Pressure of component B (PBo), Mole fraction of component B in liquid phase (xB), Mole fraction of component A in vapor phase (yA<) and Mole fraction of component B in vapor phase (yB<) and hit the calculate button. Here is how the Relative Volatility calculation can be explained with given input values -> 36 = if(0.1/0.1>0.1/0.9) { 0.8*(1-0.1)/(0.1*(1-0.8)) } else { 0.2*(1-0.9)/(0.9*(1-0.2)) } .

FAQ

What is 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. In effect, it indicates the ease or difficulty of using distillation to separate the more volatile components from the less volatile components in a mixture. By convention, relative volatility is usually denoted as α and is represented as α = if(PA/xA>PBo/xB) { mole_fraction_a_vapor*(1-xA)/(xA*(1-mole_fraction_a_vapor)) } else { mole_fraction_b_vapor*(1-xB)/(xB*(1-mole_fraction_b_vapor)) } or relative_volatility = if(Vapor Pressure of component A/Mole fraction of component A in liquid phase>Vapor Pressure of component B/Mole fraction of component B in liquid phase) { mole_fraction_a_vapor*(1-Mole fraction of component A in liquid phase)/(Mole fraction of component A in liquid phase*(1-mole_fraction_a_vapor)) } else { mole_fraction_b_vapor*(1-Mole fraction of component B in liquid phase)/(Mole fraction of component B in liquid phase*(1-mole_fraction_b_vapor)) } . Vapor pressure of component A or equilibrium vapor pressure is defined as the pressure exerted by A's vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system, The mole fraction of component A in liquid phase refers to the mole fraction of component A in the liquid phase, Vapor pressure of component B or equilibrium vapor pressure is defined as the pressure exerted by B's vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system, The mole fraction of component B in liquid phase refers to the mole fraction of component B in the liquid phase, The mole fraction of component A in vapor phase refers to the mole fraction of component A in the vapor phase and The mole fraction of component B in vapor phase refers to the mole fraction of component B in the vapor phase.
How to calculate 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. In effect, it indicates the ease or difficulty of using distillation to separate the more volatile components from the less volatile components in a mixture. By convention, relative volatility is usually denoted as α is calculated using relative_volatility = if(Vapor Pressure of component A/Mole fraction of component A in liquid phase>Vapor Pressure of component B/Mole fraction of component B in liquid phase) { mole_fraction_a_vapor*(1-Mole fraction of component A in liquid phase)/(Mole fraction of component A in liquid phase*(1-mole_fraction_a_vapor)) } else { mole_fraction_b_vapor*(1-Mole fraction of component B in liquid phase)/(Mole fraction of component B in liquid phase*(1-mole_fraction_b_vapor)) } . To calculate Relative Volatility, you need Vapor Pressure of component A (PA), Mole fraction of component A in liquid phase (xA), Vapor Pressure of component B (PBo), Mole fraction of component B in liquid phase (xB), Mole fraction of component A in vapor phase (yA<) and Mole fraction of component B in vapor phase (yB<). With our tool, you need to enter the respective value for Vapor Pressure of component A, Mole fraction of component A in liquid phase, Vapor Pressure of component B, Mole fraction of component B in liquid phase, Mole fraction of component A in vapor phase and Mole fraction of component B in vapor phase 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 Vapor Pressure of component A, Mole fraction of component A in liquid phase, Vapor Pressure of component B, Mole fraction of component B in liquid phase, Mole fraction of component A in vapor phase and Mole fraction of component B in vapor phase. We can use 2 other way(s) to calculate the same, which is/are as follows -
  • vapor_pressure_a = Mole fraction of component A in liquid phase*Vapor Pressure of pure component A
  • relative_volatility = if(Vapor Pressure of component A/Mole fraction of component A in liquid phase>Vapor Pressure of component B/Mole fraction of component B in liquid phase) { mole_fraction_a_vapor*(1-Mole fraction of component A in liquid phase)/(Mole fraction of component A in liquid phase*(1-mole_fraction_a_vapor)) } else { mole_fraction_b_vapor*(1-Mole fraction of component B in liquid phase)/(Mole fraction of component B in liquid phase*(1-mole_fraction_b_vapor)) }
Where is the Relative Volatility calculator used?
Among many, Relative Volatility calculator is widely used in real life applications like {FormulaUses}. Here are few more real life examples -
{FormulaExamplesList}
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