(A) The reaction A → 2 B + C is first order. If the initial [A] = 2.80 M and k = 3.02 x 10^-3 s^-1, what is the value of [A] after 325 s?

(B) Use data tabulated in Figure 20-4, together with equation (20.13), to show that the decomposition of H₂O₂ is a first-order reaction. Use a pair of data points for [H₂O₂]₀ and [H₂O₂]_t and their corresponding times to solve for k. Repeat this calculation using other sets of data. How should the results compare?

Figure 20-4

Eq. 20.13

Transcribed Image Text:

[H] 0.800 0.400 0.000 -0.400- -0.800 - -1.200 Slope -1.095 L - 1.095 1500 s 600 1500 s -7.30 x 10-45-1 I 1200 1800 Time, s 2400 3000