Imagine that you took a road trip. Based on the information in the table, what w
ID: 549311 • Letter: I
Question
Imagine that you took a road trip. Based on the information in the table, what was the average speed of your car?
Time
Mile marker
3pm
23
8pm
291
Express your answer to three significant figures and include the appropriate units. Use mi as an abbreviation for miles, and h for hours, or mph can be used to indicate miles per hour.
Now consider the following reaction and data:
H2+2IBr2HBr+I2
Time (s)
I2 concentration (M)
5
1.15
15
1.82
What is the average rate of formation of I2?
Express your answer to three decimal places and include the appropriate units.
Time
Mile marker
3pm
23
8pm
291
Explanation / Answer
Average speed = distance covered/ avg. time
Distance covered = 291miles - 23miles = 268mi
Time taken = 8pm - 3pm = 5hr
Average speed = 268mi/5hr = 53.6mi/h
Average rate of formation = change in concentration of
I2/time taken
Change in concentration.= 1.82M-1.15M = 0.67M
Time taken = 15-5 = 10sec
Avg rate of formation = 0.67M/10sec = 0.067M/sec