1) Ethane dissociates into methyl radicals at 700.OC with a rate constant of 5.50x10-4s-1. If the activation energy is 384kJ/mol, what would be the rate constant at 870.OC? **Reaction Analysis and Mechanism Proposal****Main Reaction:**\[ 2 \text{NO} + \text{O}_2 \rightarrow 2 \text{NO}_2 \]- **Observed Rate Changes:** - The reaction rate doubles if the $\text{O}_2$ concentration doubles while $\text{NO}$ concentration is unchanged. - The reaction rate quadruples if the $\text{NO}$ concentration doubles while $\text{O}_2$ concentration remains unchanged.**Questions and Mechanism Proposals:****a. Rate Law Expression:**- Determine the rate law expression for the above reaction and label your answer appropriately in the quiz.**Proposed Mechanisms:****Proposal I:**- **Step 1:** $\text{NO} + \text{O}_2 \rightleftharpoons \text{NO}_3$ (fast equilibrium)- **Step 2:** $\text{NO} + \text{NO}_3 \rightarrow \text{NO}_2 + \text{NO}_2$ (slow, rate-determining step, RDS)**Proposal II:**- **Step 1:** $\text{NO} + \text{NO} \rightleftharpoons \text{N}_2\text{O}_2$ (slow, RDS)- **Step 2:** $\text{O}_2 + \text{N}_2\text{O}_2 \rightarrow \text{N}_2\text{O}_4$ (fast)- **Step 3:** $\text{N}_2\text{O}_4 \rightarrow \text{NO}_2 + \text{NO}_2$ (fast)**b. Predicted Rate Laws:**- Write a predicted rate law for each proposed mechanism, ensuring no intermediates appear in the expression. Show your detailed work and label your answers on the scratch paper clearly.**c. Mechanism Evaluation:**- Determine which proposed mechanism (I or II) aligns with the rate law expression identified previously. Provide your reasoning to receive credit, and label your answer clearly on the scratch paper.

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) Ethane dissociates into methyl radicals at 700.OC with a rate constant of 5.50x10-4s-1. If the activation energy is 384kJ/mol, what would be the rate constant at 870.OC?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Ethane dissociates into methyl radicals at 700.°C with a rate constant of 5.50x10-45-1. If the activation energy is 384kJ/mol, what would be the rate constant at 870.°C?
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