The compound hexaazaisowurtzitane is one of the highest-energy explosives known (C & E News, p. 26, Jan. 17, 1994). The compound, also known as CL-20, was first synthesized in 1987. The method of synthesis and detailed performance data are still classified information because of CL-20s potential military application in rocket boosters and in warheads of smart weapons. The structure of CL-20 is N N N N N N G G G NO2 NO2 NO2 O2N O2N O2N D D D In such shorthand structures, each point where lines meet represents a carbon atom. In addition, the hydrogens attached to the carbon atoms are omitted. Each of the six carbon atoms has one hydrogen atom attached. Three possible reactions for the explosive decomposition of CL-20 are i. C6H6N12O12(s) 88n 6CO(g) 1 6N2(g) 1 3H2O(g) 1 3 2O2(g) ii. C6H6N12O12(s) 88n 3CO(g) 1 3CO2(g) 1 6N2(g) 1 3H2O(g) iii. C6H6N12O12(s) 88n 6CO2(g) 1 6N2(g) 1 3H2(g) a. Use bond energies to estimate DH for these three reactions. b. Which of the three reactions releases the largest amount of energy per kilogram of CL-20?
Chapter 8 Periodic Properties of Elements Periodic Properties Predicted by how the element is placed on the periodic table Include the atomic radius, density and electron count as well as its metallic character Periodic Table Development Developed by Mendeleev, in order of increasing atomic mass from left to right that way elements of the same property fell in the same column Quantum Mechanics describes it by describing how the electrons fill the orbitals inside the atoms of the elements Electron Configuration Shows which orbitals contain an electron in the atom 2 o He 1s means that Helium’s two electrons are in
