2 of 19 Incorrect Incorrect Incorrect Mapd erts & Company Publishers preserted b

Question

2 of 19 Incorrect Incorrect Incorrect Mapd erts & Company Publishers preserted by Sapling Leaming anic Chemistry The standard free energy of activation of one reaction A is 90.20 kJ mor (21.56 kcal mol-). The standard free energy of activation of another reaction 8 is 71.20KJ mot 298 K and 1 M concentration. (17.02 kcal mot-) Assume a temperature of By what factor is one reaction faster than the other? Number 159 Which reaction is faster? O Reaction A is faster. Reaction B is faster. Cannot be determined O There is additional feedback available! View this feedback by clicking on the bottom divider bar on the divider bar again to hide the additional feedback Close Explanation Previous Gh" Up & View Souton Try AganNext .a Ext- earch

Explanation / Answer

Apply:

k = A*Exp(-Ea/(RT))

for

k1 = A*Exp(-Ea1/(RT1))

k2 = A*Exp(-Ea2/(RT2))

substitute

K2/K1 = exp(Ea1/Ea2)

k2/k1 = exp(90.20/71.20) = 3.5496

k2 = 3.5496*k1

it is 3.5496 faster!

b)

faster reaction is B, since it has lower Activation energy, Ea

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