Question
Asked Feb 28, 2020
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Use the data in Figure 14.2 to calculate the average rate of
appearance of B over the time interval from 0 s to 40 s.

Os
40 s
1.00 mol A
0.54 mol A
0.46 mol B
0.30 mol A
0.70 mol B
O mol B
A Figure 14.2 Progress of a hypothetical reaction A
B. The volume of the flask is 1.0 L.
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Os 40 s 1.00 mol A 0.54 mol A 0.46 mol B 0.30 mol A 0.70 mol B O mol B A Figure 14.2 Progress of a hypothetical reaction A B. The volume of the flask is 1.0 L.

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Expert Answer

Step 1

Rate of reaction represents the change of concentration of a reactant or a product with respect to time. It can be expressed either by reduce amount of reactant in per unit time or increase amount of product in per unit time.

Step 2

Given information:

  • At t = 0, mole of B = 0
  • At t = 20 s, mole of B = 0.46
  • At t = 40 s, mole of B = 0.70
  • Volume = 1.0 L
Step 3

The average rate of appearance of B over the time interval from 0 s to 40 s is calculated as follows:

Chemistry homework question answer, step 3, image 1

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