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Total pressure of Gas is the sum of all the forces that the gas molecules exert on the walls of their container. Check FAQs
PT=xLiquidPsat yGas
PT - Total Pressure of Gas?xLiquid - Mole Fraction of Component in Liquid Phase?Psat - Saturated pressure?yGas - Mole Fraction of Component in Vapor Phase?

Total Pressure using Raoult's Law in VLE Example

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Here is how the Total Pressure using Raoult's Law in VLE equation looks like with Values.

Here is how the Total Pressure using Raoult's Law in VLE equation looks like with Units.

Here is how the Total Pressure using Raoult's Law in VLE equation looks like.

85000Edit=0.51Edit50000Edit0.3Edit
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Total Pressure using Raoult's Law in VLE Solution

Follow our step by step solution on how to calculate Total Pressure using Raoult's Law in VLE?

FIRST Step Consider the formula
PT=xLiquidPsat yGas
Next Step Substitute values of Variables
PT=0.5150000Pa0.3
Next Step Prepare to Evaluate
PT=0.51500000.3
LAST Step Evaluate
PT=85000Pa

Total Pressure using Raoult's Law in VLE Formula Elements

Variables
Total Pressure of Gas
Total pressure of Gas is the sum of all the forces that the gas molecules exert on the walls of their container.
Symbol: PT
Measurement: PressureUnit: Pa
Note: Value can be positive or negative.
Mole Fraction of Component in Liquid Phase
The Mole Fraction of Component in Liquid Phase can be defined as the ratio of the number of moles a component to the total number of moles of components present in the liquid phase.
Symbol: xLiquid
Measurement: NAUnit: Unitless
Note: Value should be between 0 to 1.
Saturated pressure
Saturated pressure is the pressure at which a given liquid and its vapour or a given solid and its vapour can co-exist in equilibrium, at a given temperature.
Symbol: Psat
Measurement: PressureUnit: Pa
Note: Value can be positive or negative.
Mole Fraction of Component in Vapor Phase
The Mole Fraction of Component in Vapor Phase can be defined as the ratio of the number of moles a component to the total number of moles of components present in the vapor phase.
Symbol: yGas
Measurement: NAUnit: Unitless
Note: Value should be between 0 to 1.

Other Formulas to find Total Pressure of Gas

​Go Total Pressure for Binary Liquid System for Dew-Bubble Point Calculations with Raoult's Law
PT=(x1P1sat)+(x2P2sat)
​Go Total Pressure for Binary Vapour System for Dew-Bubble Point Calculations with Raoult's Law
PT=1(y1P1sat)+(y2P2sat)

Other formulas in Raoult’s Law, Modified Raoult’s Law, and Henry’s Law in VLE category

​Go Liquid Phase Mole Fraction using Raoult's Law in VLE
xLiquid=yGasPTPsat
​Go Saturated Pressure using Raoult's Law in VLE
Psat =yGasPTxLiquid

How to Evaluate Total Pressure using Raoult's Law in VLE?

Total Pressure using Raoult's Law in VLE evaluator uses Total Pressure of Gas = (Mole Fraction of Component in Liquid Phase*Saturated pressure)/Mole Fraction of Component in Vapor Phase to evaluate the Total Pressure of Gas, The Total Pressure using Raoult's Law in VLE formula is defined as the ratio of the product of the liquid phase mole fraction and the saturated pressure to the vapour phase mole fraction of mixture or solution. Total Pressure of Gas is denoted by PT symbol.

How to evaluate Total Pressure using Raoult's Law in VLE using this online evaluator? To use this online evaluator for Total Pressure using Raoult's Law in VLE, enter Mole Fraction of Component in Liquid Phase (xLiquid), Saturated pressure (Psat ) & Mole Fraction of Component in Vapor Phase (yGas) and hit the calculate button.

FAQs on Total Pressure using Raoult's Law in VLE

What is the formula to find Total Pressure using Raoult's Law in VLE?
The formula of Total Pressure using Raoult's Law in VLE is expressed as Total Pressure of Gas = (Mole Fraction of Component in Liquid Phase*Saturated pressure)/Mole Fraction of Component in Vapor Phase. Here is an example- 85000 = (0.51*50000)/0.3.
How to calculate Total Pressure using Raoult's Law in VLE?
With Mole Fraction of Component in Liquid Phase (xLiquid), Saturated pressure (Psat ) & Mole Fraction of Component in Vapor Phase (yGas) we can find Total Pressure using Raoult's Law in VLE using the formula - Total Pressure of Gas = (Mole Fraction of Component in Liquid Phase*Saturated pressure)/Mole Fraction of Component in Vapor Phase.
What are the other ways to Calculate Total Pressure of Gas?
Here are the different ways to Calculate Total Pressure of Gas-
  • Total Pressure of Gas=(Mole Fraction of Component 1 in Liquid Phase*Saturated Pressure of Component 1)+(Mole Fraction of Component 2 in Liquid Phase*Saturated Pressure of Component 2)OpenImg
  • Total Pressure of Gas=1/((Mole Fraction of Component 1 in Vapour Phase/Saturated Pressure of Component 1)+(Mole Fraction of Component 2 in Vapour Phase/Saturated Pressure of Component 2))OpenImg
Can the Total Pressure using Raoult's Law in VLE be negative?
Yes, the Total Pressure using Raoult's Law in VLE, measured in Pressure can be negative.
Which unit is used to measure Total Pressure using Raoult's Law in VLE?
Total Pressure using Raoult's Law in VLE is usually measured using the Pascal[Pa] for Pressure. Kilopascal[Pa], Bar[Pa], Pound Per Square Inch[Pa] are the few other units in which Total Pressure using Raoult's Law in VLE can be measured.
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