Molar Enthalpy of Fusion Formula:
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Definition: The Molar Enthalpy of Fusion is the amount of energy needed to change one mole of a substance from the solid phase to the liquid phase at constant temperature and pressure.
Purpose: This calculator determines the molar enthalpy of fusion based on the solvent's freezing point, molar mass, and cryoscopic constant.
The calculator uses the formula:
Where:
Explanation: The formula relates the freezing point depression properties of a solvent to its enthalpy of fusion.
Details: Understanding this property is crucial for phase change calculations, thermodynamics studies, and designing processes involving melting or freezing.
Tips: Enter the solvent's freezing point in Kelvin, molar mass in g/mol, and cryoscopic constant in K·kg/mol. All values must be > 0.
Q1: What is the cryoscopic constant?
A: It's a constant that describes how much the freezing point of a solvent is depressed when a solute is added.
Q2: Why is the freezing point squared in the formula?
A: The relationship between freezing point and enthalpy of fusion is quadratic, derived from thermodynamic principles.
Q3: What units should I use for molar mass?
A: The calculator expects grams per mole (g/mol) for consistency with the formula.
Q4: Can I use this for any solvent?
A: Yes, as long as you have accurate values for the freezing point, molar mass, and cryoscopic constant.
Q5: How accurate is this calculation?
A: It provides a theoretical value based on ideal conditions. Real-world values may vary slightly.