The rate of the reaction in terms of the \"appearance of product\" includes the

Question

The rate of the reaction in terms of the "appearance of product" includes the change in the concentration of the product, the time interval, and the coefficient of the product.

Consider the following reaction:

2A+3B?3C+2D

The concentrations of product C at three different time intervals are given. Use the following data to determine the rate of reaction in terms of the appearance of product C between time = 0 s and time = 20 s .

Express your answer in molar concentration per second to three significant figures.

Explanation / Answer

2A + 3B ------> 3C + 2D

rate of reaction = (1/3)*rate of appearance of C = (1/3)*(change in concentration of C)/change in time = (1/3)*d[C]/dt

Now, change in time betwen t = 0 sec & t = 20 sec = 20 sec

Change in concentration of C during this time interval = 0.048 - 0 = 0.048 M

Thus, rate of reaction = (1/3)*(0.048/20) = 8*10-4 M/s

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