CH-1255

Energy profile diagrams

Chemistry · Secondary 4 · Hard · Energy profile diagrams

The energy profile diagram for a reaction is shown.

The reactants have energy 150 kJ/mol, the products have energy 90 kJ/mol, and the peak of the curve is at 210 kJ/mol.

What are the enthalpy change

\Delta H

and activation energy

E_a

for the forward reaction?

$\Delta H = -60$ kJ/mol, $E_a = 60$ kJ/mol
$\Delta H = +60$ kJ/mol, $E_a = 60$ kJ/mol
$\Delta H = -60$ kJ/mol, $E_a = 120$ kJ/mol
$\Delta H = +60$ kJ/mol, $E_a = 120$ kJ/mol

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