Enthalpy of Fusion at melting point

• Definition

  Enthalpy of Fusion at melting point is the required energy for a pure substance to transform from solid to liquid at 1 atmospheric pressure.

• Estimation Method

  - MolInstincts: The Property value is estimated by the combination of fundamental thermodynamic theories, modern modeling approaches, QSPR (quantitative structure-property relationships) methods, and ANN (Artificial Neural Network) with over fitting prevention algorithm, utilizing the quantum chemical calculations results and molecular descriptors. The estimated value is finally determined after manual inspection.
  - Joback: Group Contribution Method (Estimation of pure-component properties from group-contributions, Chem.Eng.Commun., 1987. 57. 233)

• Supplementary Explanation on Accuracy

  Comment	Meaning of Comment
  ≤ 1 kcal/mol	0 kcal/mol ≤ abs error ≤ 1 kcal/mol
  ≤ 3 kcal/mol	1 kcal/mol < abs error ≤ 3 kcal/mol
  ≤ 5 kcal/mol	3 kcal/mol < abs error ≤ 5 kcal/mol
  ≤ 7 kcal/mol	5 kcal/mol < abs error ≤ 7 kcal/mol
  > 7 kcal/mol	abs error > 7 kcal/mol
  Exp. Data Unavailable	Experimental Data are Unavailable

  Where absolute error means the absolute value of (experimental value)-(calculated value).