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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.
into exo and endo ring closures, depending whether the bond broken during the ring closure is inside (endo) or outside (exo) the ring that is being formed into tet , trig and dig geometry of the atom being attacked, depending on whether this electrophilic carbon is tet rahedral ( sp 3 hybridised ), trig onal ( sp 2 hybridised ) or diag onal ...
The sublimation that occurs at the solid-gas boundary (critical sublimation point) (corresponding to boiling in vaporization) may be called rapid sublimation, and the substance sublimes rapidly. The words "gradual" and "rapid" have acquired special meanings in this context and no longer describe the rate of sublimation. [citation needed]
The opposite of an endothermic process is an exothermic process, one that releases or "gives out" energy, usually in the form of heat and sometimes as electrical energy. [1] Thus, endo in endothermic refers to energy or heat going in, and exo in exothermic refers to energy or heat going out. In each term (endothermic and exothermic) the prefix ...
Lovers Key State Park is a 712-acre (2.88 km 2) Florida State Park located on Lover's Key and three other barrier islands—Black Island, Inner and Long Key. It is at 8700 Estero Blvd., Fort Myers Beach , between Big Carlos Pass and New Pass and 10.5 miles (16.9 km) west of Interstate 75 on exit 116.
Just offshore of the Florida Keys along the edge of the Florida Straits is the Florida Reef (also known as the Florida Reef Tract), separated from the keys by the Hawk Channel. The Florida Reef extends 170 miles (270 km) from Fowey Rocks just east of Soldier Key to just south of the Marquesas Keys.
Since then, the term "Conch Republic" has been expanded to refer to "all of the Florida Keys, or, that geographic apportionment of land that falls within the legally defined boundaries of Monroe County, Florida, northward to 'Skeeter's Last Chance Saloon' in Florida City, Dade County, Florida, with Key West as the micronation's capital and all ...
In the context of the Diels–Alder reaction, the transition state in which the most significant substituent (an electron-withdrawing and/or conjugating group) on the dienophile is oriented towards the diene π system and slips under it as the reaction takes place is known as the endo transition state. In the alternative exo transition state ...