14 FoC Catalysts

# 14 FoC Catalysts - 1 What is the activation energy for the...

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1 1 1) What is the activation energy for the cis-trans isomerization of linoleic acid? H L a L H T T R E RT E RT E RT E RT E RT E RT E L H RT E T T R E k k e e e e e e k k Ae k H L a H a L a L a H a L a H a a 1 1 ln 1 1 For linoleic acid At 250 o C, k = 8 x 10 -3 /hr At 230 o C, k = 2 x 10 -3 /hr 0 o C = 273 K R = 8.314 J mol -1 K -1 A) 25 kJ/mol B) 75 kJ/mol C) 150 kJ/mol D) 300 kJ/mol Also solve for one T given other info! 2 Be able to use the Arrhenius equation and data to solve for k, A, E a , T. Be able to derive the necessary equation starting with the Arrhenius equation. RT E RT E a a e A Ae k

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2 3 2) With this activation energy, what is the half-life of cis,cis-linoleic acid at a cooking temperature of 190 o C. For linoleic acid E a = 150 kJ/mol At 230 o C, k = 2 x 10 -3 /hr 0 o C = 273 K R = 8.314 J mol -1 K -1 t 1/2 = ln(2)/k x a H L a H a L a L a H a L a H a a T T R E x T T R E RT E RT E RT E RT E RT E RT E L H RT E e k k e e e e e e k k Ae k 1 1 1 1 1 1 A) 40 days B) 80 days C) 160 days D) 320 days 4 Today’s To Do Explain why a catalyst affects the rate of a reaction. Identify 3 ways the rate of a reaction can be increased. Calculate the change in the rate of a reaction caused by the presence of a catalyst given information about activation energies.
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## This note was uploaded on 03/29/2010 for the course CHE 132 taught by Professor Hanson during the Spring '08 term at SUNY Stony Brook.

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14 FoC Catalysts - 1 What is the activation energy for the...

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