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EPISODE · Aug 25, 2013 · 3 MIN

ejercicio termoquímica 5

from Podcast AUDIOS PARA EVERNOTE

Un ejercicio en el que hay que trabajar con energías de formación y cálculos estequiométricos. La tostación de la pirita se produce según: 4 FeS2 (s) + 11 O2 (g) ---> 2 Fe2O3 (s) + 8 SO2 (g) Calcula: La entalpía de reacción estándar La cantidad de calor, a presión constante, desprendida en la combustión de 25 g de pirita de 90 % de riqueza en peso Masas atómicas: Fe = 55,8 ; S = 32 DHof[FeS2 (g)] = -177,5 ; DHof[Fe2O3 (s)] = -822,2 ; DHof[SO2 (g)] = -296,8 todas en kJ/mol http://apoyojano.blogspot.com.es/2013/08/termoquimica-tarjeta-5.html

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