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Exam1_FR_sum04[1]

# C

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Unformatted text preview: ism? C) The following initial rates data are collected experimentally: I II. III. IV. [H2O2] 0.100 M 0.100 M 0.200 M 0.200 M [I‐] 5.00 x 10‐4 M 1.00 x 10‐3 M 1.00 x 10‐3 M 1.00 x 10‐3 M [H+] 1.00 x 10‐2 M 1.00 x 10‐2 M 1.00 x 10‐2 M 2.00 x 10‐2 M rate 0.137 M/sec 0.268 M/sec 0.542 M/sec 0.540 M/sec Based on these data, what is the differential rate law expression for the reaction? D) Could the mechanism proposed in part A be the correct mechanism? Explain. 4. The reaction 2NO N2 + O2 has the following rate law: Rate= – ∆[ NO] = k[NO]2. 2 ∆t A) After a period of 2000. s, the concentration of NO falls from an initial value of 2.8 × 10–3 mol/L to 2.0 × 10–3 mol/L. What is the rate constant, k? (include units) B) What is the initial rate of the reaction? 5. Sketch a reaction‐energy diagram with the following characteristics: • Involves a 2‐step mechanism. • The second step is rate‐determining. • The reaction in exergonic. • Clearly indicate both Ea & ∆E for the reaction on the diagram. CHEM 220 • EXAM #1 • SPRING 2004 Name: CONSTANTS & EQUATIONS MC Exam Version...
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