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El estireno, C 8 H 8 , es una de las sustancias utilizadas en la produccin de caucho sinttico. Cuando el estireno se quema en

El estireno, C 8 H 8 , es una de las sustancias utilizadas en la produccin de caucho sinttico. Cuando el estireno se quema en oxgeno para formar dixido de carbono y agua lquida en condiciones estndar a 25 C, se liberan 42,15 kJ por gramo de estireno. Encuentre la entalpa estndar de formacin de estireno a 25C.

H f (CO 2 ( g )) = 393,5 kJ/mol, H f (H 2 O( l )) = 285,8 kJ/mol

a) 4390 kJ/mol

b) 1044 kJ/mol

c) 8681 kJ/mol

d) +99 kJ/mol

e) +637 kJ/mol

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