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In thermodynamics, the enthalpy of sublimation, or heat of sublimation, is the heat required to sublimate (change from solid to gas) one mole of a substance at a given combination of temperature and pressure, usually standard temperature and pressure (STP). It is equal to the cohesive energy of the solid.
A sublimatory [1] [2] or sublimation apparatus is equipment, commonly laboratory glassware, for purification of compounds by selective sublimation. In principle, the operation resembles purification by distillation , except that the products do not pass through a liquid phase .
Prior to the development of the tape dispenser, 3M's standard clear scotch tape was sold as a roll, and had to be carefully peeled from the end and cut with scissors. To make the product more useful, the scotch tape sales manager at 3M, John Borden, designed the first tape dispenser in 1932, which had a built-in cutting mechanism and would hold the cut end of the tape until its next use.
Common transfer types are Heat Transfer Vinyl cut with a vinyl cutter, Printable Heat Transfer Vinyl, Inkjet Transfer Paper, Laser Transfer Paper, Plastisol Transfers, and Sublimation. Using a Heat Press to apply a heat transfer is a way to ensure accurate time, temperature, and pressure, which are all essential to the transfer process. [1]
The low temperature and direct sublimation to a gas makes dry ice an effective coolant, since it is colder than water ice and leaves no residue as it changes state. [4] Its enthalpy of sublimation is 571 kJ/kg (25.2 kJ/mol, 136.5 calorie/g). Dry ice is non-polar, with a dipole moment of zero, so attractive intermolecular van der Waals forces ...
1 Gummed (water-activated) tape dispenser. 2 BENEFITS. 3 THE MOISTENING SYSTEM. Toggle THE MOISTENING SYSTEM subsection. 3.1 Water Level Control. 3.2 Heaters. 3.3 ...
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- 8273 Green Meadows Dr N #100, Lewis Center, OH · Directions · (614) 847-1515
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