Suppose a chemist discovers a new metallic element and names it "Xtrinsium" (Xt). Xt exhibits chemical behaviour similar to an alkaline earth. Xt(s) + Cl(g) XtCl(s) - Lattice energy for XtCl First Ionization energy of Xt Second Ionization energy of Xt Electron affinity of Cl Bond energy of Cl Enthalpy of sublimation (atomization) of Xt Use the above data to calculate AH, for Xtrinsium chloride. -2120. kJ/mol 490. kJ/mol 882 kJ/mol -348.7 kJ/mol 239 kJ/mol 160. kJ/mol

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Solutions Step 1 The calculation of the enthalpy change H for the formation of Xtrinsium chloride XtCl can be done using Hesss Law which states that t... View the full answer