There are several factors that affect the rate of a reaction. These factors incl

Question

There are several factors that affect the rate of a reaction. These factors include temperature, activation energy, steric factors (orientation), and also collision frequency, which changes with concentration and phase All the factors that affect reaction rate can be summarized in an equation called the Arrhenius equation Ae where k is the rate constant, A is the frequency factor, Ea is the activation energy, R 8.314 J/(mol K) is the universal gas constant, and T is the absolute temperature Figure 1 of 1 slope In k 1/T Part A A certain reaction has an activation energy of 70.0 kJ/mol and a frequency factor of A1 6.50x1012 M-1s What is the rate constant, k, of this reaction at 28.0 C Express your answer with the appropriate units. Indicate the multiplication of units explicitly either with a multiplication dot asterisk) or a dash HA Value Units Hints My Answers Give Up Review Part Submit Incorrect, Try Again The linear form of the Arrhenius equation The Arrhenius equation can be rearranged to a form that resembles the equation for a straight line ln k In A where y is Ink, m is the slope or -T.z is T. and b is the y-intercept orIn A. The rity of this equation is ustrated graphically in the image (Figure 1)

Explanation / Answer

lnk = -Ea/RT + lnA

2.303logk = -70000 Jmol-1 / (8.314 Jmol-1K-1 * 301 K) +2.303log(6.50*1012) M-1s-1

2.303 logk = -27.97 + 29.51 M-1s-1
log k = 0.67 M-1s-1

k = 1.95 M-1s-1

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