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Unformatted text preview: Chemical & Biochemical Processes Reaction Kinetics Tutorial 1 1. At 25 C a rate constant has a value of 5 10 3 s1 . Activation energy is 55,000 J mol1 . What is the value of the rate constant for the same reaction at 70 C ? 2. Ethylene dichloride can be thermally cracked to yield vinyl chloride according to: CH 2 Cl.CH 2 Cl CH 2 =CHCl+HCl If the reaction is first order and the velocity constant is given by: RT e k 460 , 196 81 . 10 10 = , calculate the value of k at 600 C. Note that the gas constant, R , is given by 8.31 J mol1 K1 . 3. The following values have been obtained for the velocity constant ( k ) in the decomposition of N 2 O 5 : T ( C) 25 45 65 k (min1 ) 4.7 105 2.0 103 3.0 102 3.0 101 Calculate the energy of activation ( E ) and the Arrhenius factor ( A ) in the equation: RT E Ae k = for this reaction. R = 8.31 J mol1 K1 . 4. The decomposition of compound A is first order with an activation energy of 52.3 kJ mol1 . If 10 % of A is decomposed in 10 minutes at 10...
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 Spring '10
 reddy
 Kinetics

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