1. What is Molar Mass of Solvent given Ebullioscopic Constant?

Definition: This calculator determines the molar mass of a solvent using its ebullioscopic constant, enthalpy of vaporization, and boiling point.

Purpose: It helps chemists and researchers calculate solvent properties important for colligative properties and solution chemistry.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( M_{solvent} \) — Molar mass of solvent (g/mol)
• \( k_b \) — Ebullioscopic constant (K·kg/mol)
• \( \Delta H_{vap} \) — Molar enthalpy of vaporization (J/mol)
• \( T_{bp} \) — Solvent boiling point (K)
• \( R \) — Universal gas constant (8.314 J/mol·K)

Explanation: The formula relates the boiling point elevation properties of a solvent to its molar mass through thermodynamic principles.

3. Importance of Molar Mass Calculation

Details: Knowing the molar mass is essential for preparing solutions with precise concentrations and understanding colligative properties.

4. Using the Calculator

Tips: Enter the ebullioscopic constant (default 0.512 K·kg/mol for water), enthalpy of vaporization in J/mol, and boiling point in Kelvin. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the ebullioscopic constant?
A: It's a constant that relates molality to boiling point elevation for a particular solvent.

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

Q3: Why must temperature be in Kelvin?
A: The Kelvin scale is an absolute temperature scale required for thermodynamic calculations.

Q4: What's a typical ebullioscopic constant value?
A: For water it's 0.512 K·kg/mol, but varies for other solvents (e.g., 2.53 for benzene).

Q5: Can I use this for any solvent?
A: Yes, as long as you have the correct constants and boiling point for your solvent.