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Solutions containing lyes can cause chemical burns, permanent injuries, scarring and blindness, immediately upon contact. Lyes may be harmful or even fatal if swallowed; ingestion can cause esophageal stricture. Moreover, the solvation of dry solid lye is highly exothermic and the resulting heat may cause additional burns or ignite flammables.
Once initiated, the exothermic transformation is complete in a few minutes, with a 6.5% increase in volume of the solid. The β form can be crystallized from supercooled solutions at −26 °C, and melts partially at −1.83 °C. [19] The "sodium hydroxide" of commerce is often the monohydrate (density 1.829 g/cm 3). Physical data in technical ...
Endotherms cannot, in general, afford such long periods without food, but suitably adapted ectotherms can wait without expending much energy. Endothermic vertebrate species are therefore less dependent on the environmental conditions and have developed a higher variability (both within and between species) in their daily patterns of activity.
The energy released by the solvation of the ammonium ions and nitrate ions is less than the energy absorbed in breaking up the ammonium nitrate ionic lattice and the attractions between water molecules. Dissolving potassium hydroxide is exothermic, as more energy is released during solvation than is used in breaking up the solute and solvent.
Saponification can occur in oil paintings over time, causing visible damage and deformation. Oil paints are composed of pigment molecules suspended in an oil-binding medium . Heavy metal salts are often used as pigment molecules, such as in lead white , red lead , and zinc white . [ 8 ]
In today's puzzle, there are seven theme words to find (including the spangram). Hint: The first one can be found in the bottom half of the board. Here are the first two letters for each word: ST ...
If decomposition is sufficiently exothermic, a positive feedback loop is created producing thermal runaway and possibly an explosion or other chemical reaction. Thermal decomposition is a chemical reaction where heat is a reactant.
In case you’re not familiar with these viruses, norovirus causes vomiting and diarrhea (sometimes at the same time), while hepatitis A impacts the liver and can cause diarrhea, fatigue, joint ...