The enthalpy of fusion of γ-Mn at 1386 K has been determined to be (3.05 ± 0.15) kcal th mol 1 from calorimetric measurements of the enthalpies of solution of γ-Mn in liquid Mn + Ni alloys. From this value, and the known enthalpy of transformation from γ-Mn to δ-Mn, we find...
The crystallinity determination of polymers using differential scanning calorimetry (DSC) is a standard procedure in industrial and university research. Its value strongly depends on the enthalpy of fusion, which cannot be determined directly using DSC, but must be calibrated using external methods such...
The enthalpies of melting show a reverse alternation, so that the total enthalpy of fusion plus transition does not show a regular pattern of alternation. The X-ray powder patterns for the twenty acids have also been obtained, as well as single crystal data for the C 4 and C 8 acids. ...
Related to Enthalpy of fusion:heat of fusion,Enthalpy of vaporization,Enthalpy of sublimation heat of fusion n. The amount of heat required to convert a unit mass of a solid at its melting point into a liquid without an increase in temperature. ...
Help calculating the enthalpy of fusion «on:December 02, 2006, 04:23:07 PM » Using ?Hfus= [RT*2/?T] xB where R = 8.31451 J K-1 mol-1 gas constant T* = 273.15 freezing point of the pure solvent in Kelvin ?Hfus = the enthalpy of fusion of the solvent ...
The results show that the precision specified for indium for the enthalpy of fusion determined by DSC (<1%) can also be achieved for organic materials if enough attention is paid to certain points. The precision with which the enthalpy of fusion can be determined by DSC depends on many ...
Huang,J.Y. Zhang.Enthalpy of fusion and equilibrium melting point of the β-form of polypropylene. Die Markromoleculare Chemie, Rapid Communications . 1984G. Shi, B. Huang, J. Zhang, Enthalpy of fusion and equi- librium melting point of the β-form of polypropylene, Macromol. Chem. Rap...
5 and \(H_f\) is the enthalpy of fusion of fully crystalline material. \(H_f\) can be obtained from an extrapolation between the melting enthalpy of various thermoplastic samples and crystallinity determined by Wide Angle X-Ray Diffraction. Eq. 15 is applicable to the neat polymer by ...
The total energy is always treated as the enthalpy of fusion for the common solidification process. In this case the application of magnetic field can thus change the energy of the system, but have quite limited effect as discussed above. During the recalescence process from deep undercooled ...
For this class of compounds, it is observed a high discrepancy in the available data published in NIST [25], mainly for the experimentalenthalpy of vaporization. In the other side, Tables-2 and 3 show that Equation (3) presented a very accurate estimative for the enthalpy of fusion. ...