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( 1 . 5 puntos ) . Representar el ciclo de Born - Haber por medio de la ley de Hess y calcular la energ

(1.5 puntos). Representar el ciclo de Born-Haber por medio de la ley de Hess y calcular la
energa de red (energa reticular) del cloruro de calcio dado que la entalpia de sublimacin del
calcio es 178kJmol y la entalpa de reaccin es -796kJmol. La primera y segunda energa de
ionizacin del Ca es 590kJmol y 1145kJmol, respectivamente. La afinidad electrnica del
cloro es -349kJmol y la entalpia de enlace del cloro es 244kJmol. La ecuacin que representa
la formacin del compuesto es:
Ca(s)+Cl2(g)CaCl2(s)
(1.0 punto). Calcular de la entalpia de reaccin, por medio de entalpias de entalpias de enlace
promedio de la siguiente reaccin:
SiH3Cl(g)+CH4(g)SiH3CH3(g)+HCl(g)
datos: H(Si-Cl)enlace=464KJmol,H(C-H)enlace=413KJmol,H(Si-C)enlace=301KJmol y H(H-Cl)enlace=431KJmol
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