Lab demonstration separating of sand and camphor using Sublimation
Sublimation is the transition of a substance directly from the solid to the gas phase without passing through an intermediate liquid phase. Sublimation is an endothermic phase transition that occurs at temperatures and pressures below a substance's triple point in its phase diagram. The reverse process of sublimation is desublimation, or deposition.
At normal pressures, most chemical compounds and elements possess three different states at different temperatures. In these cases, the transition from the solid to the gaseous state requires an intermediate liquid state. Note, however, that the pressure referred to here is the partial pressure of the substance, not the total (e.g. atmospheric) pressure of the entire system. So, all solids that possess an appreciable vapor pressure at a certain temperature usually can sublime in air (e.g. water ice just below 0 °C). For some substances, such as carbon and arsenic, sublimation is much easier than evaporation from the melt, because the pressure of their triple point is very high, and it is difficult to obtain them as liquids.
Sublimation requires additional energy and is an endothermic change. The enthalpy of sublimation (also called heat of sublimation) can be calculated as the enthalpy of fusion plus the enthalpy of vaporization.
Видео Lab demonstration separating of sand and camphor using Sublimation канала Mastermind Studios
At normal pressures, most chemical compounds and elements possess three different states at different temperatures. In these cases, the transition from the solid to the gaseous state requires an intermediate liquid state. Note, however, that the pressure referred to here is the partial pressure of the substance, not the total (e.g. atmospheric) pressure of the entire system. So, all solids that possess an appreciable vapor pressure at a certain temperature usually can sublime in air (e.g. water ice just below 0 °C). For some substances, such as carbon and arsenic, sublimation is much easier than evaporation from the melt, because the pressure of their triple point is very high, and it is difficult to obtain them as liquids.
Sublimation requires additional energy and is an endothermic change. The enthalpy of sublimation (also called heat of sublimation) can be calculated as the enthalpy of fusion plus the enthalpy of vaporization.
Видео Lab demonstration separating of sand and camphor using Sublimation канала Mastermind Studios
Показать
Комментарии отсутствуют
Информация о видео
Другие видео канала
Lab demonstration separating of sand and salt using filtrationLab demostration separating salt sand and calcium carbonateLab demonstration neutralization reactionLab demonstration distillation processLab preparation of ammonia gasTo Prepare Crystals of Copper Sulphate, from the given impure sample of blue vitriol | CBSE | NCERTPurification of Copper Sulphate by Crystallization - MeitY OLabsHindi version : Precipitation reaction between Barium (II) Nitrate and Sodium Sulphate | ChemistryMagic showSublimation Process|Separation of Mixture of Sand and Naphthalene|Lab Mg + HCl and eudiometer tubeEXPERIMENT NO 2 (BP306) determine solubility of sodium chloride by gravimetric method.Separation of Sand and SaltLab demonstration precipitation reactionDetermination of Viscosity Using Ostwald Viscometer (With observation and Calculation) HINDIPreparation of Carbondioxide in lab to study its propertiesReaction between Barium Chloride and Dilute Sulphuric acidDetection of Acidic and Basic radicals in laboratory ( PART I )How to identify Camphor tree Cinnamomum CamphoraLABORATORY PREPARATION OF HYDROGEN GAS AND PROCEDURE