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Elevation in Boiling Point given Relative Lowering of Vapour Pressure Calculator

Boiling Point Elevation Formula:

\[ \Delta T_b = \frac{RLVP \times R \times (T_{bp}^2)}{\Delta H_{vap}} \]

K
J/mol

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1. What is Boiling Point Elevation?

Definition: Boiling point elevation refers to the increase in the boiling point of a solvent upon the addition of a solute.

Purpose: This calculator determines how much the boiling point increases based on the relative lowering of vapor pressure.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \Delta T_b = \frac{RLVP \times R \times (T_{bp}^2)}{\Delta H_{vap}} \]

Where:

Explanation: The formula relates the colligative property of vapor pressure lowering to the boiling point elevation.

3. Importance of Boiling Point Elevation

Details: Understanding boiling point elevation is crucial in chemistry, food processing, and industrial applications where precise temperature control is needed.

4. Using the Calculator

Tips: Enter the relative lowering of vapor pressure, solvent boiling point in Kelvin, and molar enthalpy of vaporization in J/mol. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is relative lowering of vapor pressure?
A: It's the ratio of vapor pressure lowering to the vapor pressure of the pure solvent.

Q2: How do I find the molar enthalpy of vaporization?
A: It can be found in chemical reference tables or determined experimentally.

Q3: Why does boiling point elevation occur?
A: Adding solute lowers the vapor pressure, requiring higher temperature to reach boiling.

Q4: Does this work for all solvents?
A: The formula applies to non-volatile solutes in ideal solutions.

Q5: What are typical values for boiling point elevation?
A: For dilute solutions, it's usually a few degrees at most.

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