Reactant R can form two products via separate pathways: • Pathway 1 (to P₁): , •…

CHEMISTRY · Subjective · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry

Problem

Reactant R can form two products via separate pathways: • Pathway 1 (to P₁): Ea=75 kJ mol−1E_a = 75\,\text{kJ mol}^{-1}, ΔG∘=−25 kJ mol−1\Delta G^\circ = -25\,\text{kJ mol}^{-1} • Pathway 2 (to P₂): Ea=125 kJ mol−1E_a = 125\,\text{kJ mol}^{-1}, ΔG∘=−80 kJ mol−1\Delta G^\circ = -80\,\text{kJ mol}^{-1} Identify which product is kinetically favored and which is thermodynamically favored, and state which product would be expected to predominate (a) after a short reaction time at 25 °C and (b) after prolonged heating at 80 °C. Provide brief reasoning.

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