finalprep - CHEM 251 Phys Chem for Engineers December 2009...

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CHEM 251 Phys. Chem. for Engineers December 2009 Final Exam Prep: Voluntary Quiz As well as all material constants and coefficients that you will need in the required units, the following formulae will be given to you: p + a n V 2 ( V - bn ) = nRT (0.1) p = nRT V - bn - a n V 2 (0.2) d E cv d t = d Q d t + d W S d t + ˙ m h H spec 1 - H spec 2 + g ( h 1 - h 2 ) + 1 2 ( v 2 1 - v 2 2 ) (0.3) 1 v 0 ([ S ] 0 ) = [ S ] 0 + K M v max [ S ] 0 (0.4) = 1 v max + K M v max 1 [ S ] 0 . (0.5) 0–1
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1. The Coulomb potential between two particles i and j in one dimension is defined as: V ( x i , x j ; e , q i , q j ) = q i q j e ( x i - x j ) - 1 , (0.6) where q i and q j are the particle point charges and e is the dielectric constant. Calculate the forces f i and f j exerted on the particles due to this potential energy function. 2. For the following rate expressions, state the order of the reaction with respect to each species, the total rate order of the reaction and the units of the rate constant, k : (a) Rate = k [ ClO ][ BrO ] (b) Rate = k [ NO ] 2 [ O 2 ] (c) Rate = k [ HI ] 2 [ O 2 ] [ H + ] 1 2 3. Calculate the ratio of rate constants for two thermal reactions
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