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Relative Lowering of Vapour Pressure given Elevation in Boiling Point Calculator

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✖The Molar Enthalpy of Vaporization is the amount of energy needed to change one mole of a substance from the liquid phase to the gas phase at constant temperature and pressure.ⓘ Molar Enthalpy of Vaporization [ΔH_vap]			+10% -10%
✖Boiling point elevation refers to the increase in the boiling point of a solvent upon the addition of a solute.ⓘ Boiling Point Elevation [ΔT_b]			+10% -10%
✖Solvent boiling point is the temperature at which the vapor pressure of the solvent equals the pressure surrounding and changes into a vapor.ⓘ Solvent Boiling Point [T_bp]			+10% -10%

✖The Relative Lowering of Vapour Pressure is the lowering of vapour pressure of pure solvent on addition of solute.ⓘ Relative Lowering of Vapour Pressure given Elevation in Boiling Point [RLVP]

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Relative Lowering of Vapour Pressure given Elevation in Boiling Point Solution

STEP 0: Pre-Calculation Summary

Formula Used

Relative Lowering of Vapour Pressure = (Molar Enthalpy of Vaporization*Boiling Point Elevation)/([R]*Solvent Boiling Point*Solvent Boiling Point)
RLVP = (ΔH_vap*ΔT_b)/([R]*T_bp*T_bp)
This formula uses 1 Constants, 4 Variables

Constants Used

[R] - Universal gas constant Value Taken As 8.31446261815324

Variables Used

Relative Lowering of Vapour Pressure - The Relative Lowering of Vapour Pressure is the lowering of vapour pressure of pure solvent on addition of solute.
Molar Enthalpy of Vaporization - (Measured in Joule per Mole) - The Molar Enthalpy of Vaporization is the amount of energy needed to change one mole of a substance from the liquid phase to the gas phase at constant temperature and pressure.
Boiling Point Elevation - (Measured in Kelvin) - Boiling point elevation refers to the increase in the boiling point of a solvent upon the addition of a solute.
Solvent Boiling Point - (Measured in Kelvin) - Solvent boiling point is the temperature at which the vapor pressure of the solvent equals the pressure surrounding and changes into a vapor.

STEP 1: Convert Input(s) to Base Unit

Molar Enthalpy of Vaporization: 40.7 Kilojoule per Mole --> 40700 Joule per Mole (Check conversion here)
Boiling Point Elevation: 0.99 Kelvin --> 0.99 Kelvin No Conversion Required
Solvent Boiling Point: 15 Kelvin --> 15 Kelvin No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

RLVP = (ΔH_vap*ΔT_b)/([R]*T_bp*T_bp) --> (40700*0.99)/([R]*15*15)

Evaluating ... ...

RLVP = 21.5383733410514

STEP 3: Convert Result to Output's Unit

21.5383733410514 --> No Conversion Required

FINAL ANSWER

21.5383733410514 ≈ 21.53837 <-- Relative Lowering of Vapour Pressure

(Calculation completed in 00.004 seconds)

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< Elevation in Boiling Point Calculators

Ebullioscopic Constant using Molar Enthalpy of Vaporization

LaTeX Go Ebullioscopic Constant of Solvent = ([R]*Solvent Boiling Point*Solvent Boiling Point*Molar Mass of Solvent)/(1000*Molar Enthalpy of Vaporization)

Ebullioscopic Constant using Latent Heat of Vaporization

LaTeX Go Ebullioscopic Constant of Solvent = ([R]*Solvent BP given Latent Heat of Vaporization^2)/(1000*Latent Heat of Vaporization)

Ebullioscopic Constant given Elevation in Boiling Point

LaTeX Go Ebullioscopic Constant of Solvent = Boiling Point Elevation/(Van't Hoff Factor*Molality)

Elevation in Boiling Point of Solvent

LaTeX Go Boiling Point Elevation = Ebullioscopic Constant of Solvent*Molality

Relative Lowering of Vapour Pressure given Elevation in Boiling Point Formula

LaTeX Go

Relative Lowering of Vapour Pressure = (Molar Enthalpy of Vaporization*Boiling Point Elevation)/([R]*Solvent Boiling Point*Solvent Boiling Point)
RLVP = (ΔH_vap*ΔT_b)/([R]*T_bp*T_bp)

What causes the Relative Lowering Of Vapour Pressure?

This lowering in vapour pressure is due to the fact that after the solute was added to the pure liquid (solvent), the liquid surface now had molecules of both, the pure liquid and the solute. The number of solvent molecules escaping into vapour phase gets reduced and as a result the pressure exerted by the vapour phase is also reduced. This is known as relative lowering of vapour pressure. This decrease in vapour pressure depends on the amount of non-volatile solute added in the solution irrespective of its nature and hence it is one of the colligative properties.

How to Calculate Relative Lowering of Vapour Pressure given Elevation in Boiling Point?

Relative Lowering of Vapour Pressure given Elevation in Boiling Point calculator uses Relative Lowering of Vapour Pressure = (Molar Enthalpy of Vaporization*Boiling Point Elevation)/([R]*Solvent Boiling Point*Solvent Boiling Point) to calculate the Relative Lowering of Vapour Pressure, The Relative Lowering of Vapour Pressure given Elevation in Boiling Point is the relative measure of lowering of vapour pressure on addition of solute to solvent. Relative Lowering of Vapour Pressure is denoted by RLVP symbol.

How to calculate Relative Lowering of Vapour Pressure given Elevation in Boiling Point using this online calculator? To use this online calculator for Relative Lowering of Vapour Pressure given Elevation in Boiling Point, enter Molar Enthalpy of Vaporization (ΔH_vap), Boiling Point Elevation (ΔT_b) & Solvent Boiling Point (T_bp) and hit the calculate button. Here is how the Relative Lowering of Vapour Pressure given Elevation in Boiling Point calculation can be explained with given input values -> 21.53837 = (40700*0.99)/([R]*15*15).

FAQ

What is Relative Lowering of Vapour Pressure given Elevation in Boiling Point?

The Relative Lowering of Vapour Pressure given Elevation in Boiling Point is the relative measure of lowering of vapour pressure on addition of solute to solvent and is represented as RLVP = (ΔH_vap*ΔT_b)/([R]*T_bp*T_bp) or Relative Lowering of Vapour Pressure = (Molar Enthalpy of Vaporization*Boiling Point Elevation)/([R]*Solvent Boiling Point*Solvent Boiling Point). The Molar Enthalpy of Vaporization is the amount of energy needed to change one mole of a substance from the liquid phase to the gas phase at constant temperature and pressure, Boiling point elevation refers to the increase in the boiling point of a solvent upon the addition of a solute & Solvent boiling point is the temperature at which the vapor pressure of the solvent equals the pressure surrounding and changes into a vapor.

How to calculate Relative Lowering of Vapour Pressure given Elevation in Boiling Point?

The Relative Lowering of Vapour Pressure given Elevation in Boiling Point is the relative measure of lowering of vapour pressure on addition of solute to solvent is calculated using Relative Lowering of Vapour Pressure = (Molar Enthalpy of Vaporization*Boiling Point Elevation)/([R]*Solvent Boiling Point*Solvent Boiling Point). To calculate Relative Lowering of Vapour Pressure given Elevation in Boiling Point, you need Molar Enthalpy of Vaporization (ΔH_vap), Boiling Point Elevation (ΔT_b) & Solvent Boiling Point (T_bp). With our tool, you need to enter the respective value for Molar Enthalpy of Vaporization, Boiling Point Elevation & Solvent Boiling Point and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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