Pаrt A- The initiаl rаte оf the reactiоn оf X and Y was measured at 25 °C using various concentrations of X2 and Y2. The data collected is shown in the table below: 2X2(g) + Y2 (g) → 2X2Y(g) Experiment [X2], (M) [Y2], (M) Initial Rate, (M/s) 1 0.022 0.015 1.25 x 10-2 2 0.044 0.015 2.50 x 10-2 3 0.022 0.030 1.25 x 10-2 1) Determine the rate law of the reaction above, show all your work. Part B- Below is the reaction profile for the reaction in part A use it to answer the questions below. 2) What is the rate limiting step of the reaction Step 1 or Step 2? Explain your reasoning? 3) Is the reaction exothermic or endothermic? Why? 4) What is the ΔH of the overall reaction? Show your work? Part C- Using information from Part B answer the following 5) Predict the sign on delta S for the reaction? And explain your reasoning. 2X2(g) + Y2 (g) → 2X2Y(g) 6) Predict the spontaneity (Delta G) of this reaction and explain your answer. Part D- Use the information in Part A and Part B and the proposed mechanism shown below to answer the following questions about this overall reaction: 2X2(g) + Y2 (g) → 2X2Y(g) Proposed mechanism: Step 1: X2 (g) → 2X (g) Step 2: 2X(g) + X2 (g)+ Y2 (g)→ 2X2Y (g) 7) Identify any intermediates present? Explain your answer. 8) Identify any catalyst present? Explain your answer. 9) Is the reaction mechanism valid? Why or why not? Explain your reasoning in 1-2 sentences.
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