Calculate the average rate of reaction between 5.0 and 31.0 s ? Calculate the in

Question

Calculate the average rate of reaction between 5.0 and 31.0 s ?
Calculate the instantaneous rate of reaction at 13 s ?
Calculate the initial rate of reaction?
Calculate the instantaneous rate of formation of ethylene at 41.0 s ?

Cyclobutane can decompose to form ethylene: CaHe(g) - mass spectrometry. Which of the following is the rate of reaction? 202Hs9). The cyclobutane concentration can be measured as a function of time (shown below) by 024 022 02 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 20 40 60 80 100 Time (s)

Explanation / Answer

1. Average rate of reaction between 5.0 s and 31.0 s

First observe the concentration at 5.0 and 31.0

From the graph concentration at 5.0 s is 0.2 M and at 31.0 s is

0.08 M

The formula is

Average rate = change in concentration / change in time

( Change in concentration = 0.08-0.2

= -0.12 M

Change in time = 31.0 -5.0 = 26s )

Average rate = (-0.12) / (26) = 0.004

(You will get a positive answer because rate of consumption is.equal to rate of formation)

2. Instantaneous rate at 13 s

Concentration at 13 s = 0.16 M

Instantaneous rate = concentration / time

= 0.16 / 13

= 0.012

4. Instantaneous rate at 41 s for formation

= (1/2)* (0.058/41)

= (1/2) * (0.0014)

= 7 * 10^-4

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