For the reaction ABC + D⇄AB + CD, ΔHrxn = 255KJ/mol and Ea(fwd) = 215KJ/mol.
A chemical reaction that cannot be represented as the sum of simpler chemical reactions. Stepwise chemical reactions consist of two or more single-step reactions, which are often referred to as simply “steps” of a complex reaction.
For the reaction,
ABC + D ⇄ AB + CD
Given,
ΔH°ₓₙ = - 85 kJ/mol and Ea (fwd.) = 255kJ/mol
Assuming a one step reaction, calculate Ea (rev),
⇒ f = [tex]e^{\frac{- EA}{RT} }[/tex],
⇒ - Ea / RT = [tex]\frac{255 kJ/mol}{8.314 kJ/mol * 298 K}[/tex]
⇒ 9.1 × 10⁻⁴ kJ/mol.
Hence, Ea (rev) would be 9.1 × 10⁻⁴ kJ/mol.
To learn more about one step reaction here
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