HW 3 S_corrected - CHE4473 Kinetics Spring 2015 Homework N3...

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CHE4473 Kinetics Spring 2015 Homework N°3: Rate constants, activation energy, kinetic theories Due Tuesday FEB 9 th 2016 1. For a gas reaction at 400 K the rate is reported as: (a) What are the units of the rate constant? (b) What is the value of the rate constant for this reaction if the rate equation is expressed as
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2. The pyrolysis of ethane proceeds with an activation energy of about 300 kJ/mol. How much faster is the decomposition at 650°C than at 500°C? Use R = 8.3144 J/mol K
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3. Let’s analyze an oxidation reaction occurring in air at room temperature. Calculate (a) The most probable molecular speed of oxygen molecules at room temperature (b) The fraction of molecules that have high enough energy to undergo a reaction with a compound B if the activation energy for this reaction is 45 kJ/mole. (c) The reaction rate for this reaction if the partial pressure of O 2 is 0.21 atm and that of the compound B is 0.01 atm. The cross sectional collision area of O 2 and the compound B is 118,000 m 2 /mol Most probable molecular speed: u =
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  • Spring '14
  • LanceL.Lobban
  • Reaction, Chemical reaction, Reaction rate constant

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