Zohrehgh6518.blogfa.com Website Review

Test devices: Capillary tu*e-Thermometer-Bath-oil-thread-clamp and jute-naphthalene-By energy absorption, the regular arrangement of particles in a solid and crystalline composition is converted to irregular arrangement (liquid state). Melt this action. The melting phenomenon occurs when thermal energy is fueled by intermolecular forces that keep the particles in solid state. The melting point is a temperature composition in which the body becomes liquid. At this temperature, the vapor pressure of the liquid and the solid vapor pressure are equal and the two liquid and solid phases are in equilibrium. The melting temperature of a pure body stays constant during the melting operation. In other words, if we give a pure solid to a liquid and solid mixture, until the solid is not converted to liquid, the temperature of the object will not increase and if the heating stops , Until the whole mixture is solid, the temperature will not drop. Some organic solids decompose at melting temperature or before it through heat. In this case, instead of melting point, the decomposition temperature could be used as a physical property. Some materials have high vapor pressure, so that they are submerged at or near their melting point. In such cases, the melting point is determined in the tu*e in the package. Some materials lose their crystallization before melting the solvent. In this case, the first drop of liquid is observed. Melting point