Organic Chemistry 1 Quiz
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A chemist studies the temperature dependence of an SN2 reaction between ethyl iodide and cyanide ion in DMSO. At 25°C, the reaction has a rate constant of 3.2 × 10⁻² M⁻¹s⁻¹, and at 45°C, the rate constant increases to 1.1 × 10⁻¹ M⁻¹s⁻¹. When the same reaction is performed at 45°C but with ethyl bromide instead of ethyl iodide, while keeping all other conditions identical, the rate constant is measured as 2.8 × 10⁻² M⁻¹s⁻¹. What can be concluded about the activation energy difference between these two substrates?
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