Reaction Energy Profile

AP Chemistry· difficulty 3/5

Two reactions with the same Ea(fwd) are shown. Which statement is correct?

A
$They have different forward rates$
B
$They have the same forward rate constant at the same T$
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C
$Endothermic reactions always go faster$
D
$Exothermic reactions always have lower Ea$

Explanation

Rate constant depends on Ea(fwd) and T (Arrhenius), not ΔH. Equal Ea gives equal k.

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