4 The following reaction is performed eight times and graphe

4. The following reaction is performed eight times and graphed. The graph for the concentration of A is shown to the right. What is the reaction order with respect to A. Can this be determined from the information I have given? 2.0 r(A Explain your answer 2 A(g) + B(g) C(g) + D(g)

Solution

the plot of concentration of Avs time is exponential. This suggests the reaction to be 1st order. since for 1st order.

-dA/dt= rate of disappearance of A= K[A]

when integrated, the equation becomes

[A] = [A]0exp^(-Kt), where [A]0= initial concentration of A and A is concentration of A at any time t

The plot of A vs time will be exponential and hence the reaction with respect to A is 1st order.