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By Paul Nels Rylander

"Contains the complaints of the ... convention on Catalysis in natural Syntheses.".

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9 5 + 0 . 5 χ 0 . 7 8 ) . 0 c e n t i p o i s e s , or 0 . 0 1 g m . / c m . s e c . S i n c e the c o n c e n ­ t r a t i o n o f n i t r o b e n z e n e i n the l i q u i d i s r e l a t i v e l y s m a l l (^4 mole % ) , the d e n s i t y and v i s c o s i t y o f the l i q u i d w i l l be a s ­ sumed to be the same a s t h o s e o f p u r e e t h a n o l . 5 C o n s i d e r t h a t H2 i s the s p e c i e s b e i n g t r a n s p o r t e d . The d i f f u s i o n c o e f f i c i e n t o f H2 i n e t h a n o l (D/\) i s a b o u t 5 .

S i n c e i t h a s been assumed t h a t 1 mole o f Β r e a c t s w i t h one mole o f A , the r a t e o f l i q u i d / s o l i d t r a n s p o r t o f R e a c t a n t B , - r B, i s equal t o t h e r a t e o f r e a c t i o n o f A , - r A. The i n t r i n s i c c h e m i c a l r e a c t i o n r a t e i s assumed t o be z e r o - o r d e r i n Reactant B. T h i s assumption i s not as r e s t r i c t i v e as i t m i g h t seem and does a l l o w a s i g n i f i c a n t s i m p l i c a t i o n o f the m a t h e m a t i c s .

When n i s s m a l l ( < ^ 0 . 5 ) , t h e a p p a r e n t a c t i v a t i o n e n e r g y f o r a r e a c t i o n w h i c h i s c o n t r o l l e d by c h e m i c a l r e a c t i o n w i t h i n 35 G E O R G E W. 0 (gm" ) the p a r t i c l e i s r e d u c e d to a b o u t h a l f o f i t s i n t r i n s i c v a l u e . T h u s , an o b s e r v e d a c t i v a t i o n e n e r g y o f 10 k c a l / m o l e c o u l d a r i s e from a c a s e where η = 1 . 0 w i t h an i n t r i n s i c a c t i v a t i o n e n e r g y o f 10 k c a l m o l e , o r from a c a s e where η < ^ 0 .

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