CH-1256

Energy profile diagrams

Chemistry · Secondary 4 · Hard · Energy profile diagrams

For a reaction, the energy profile diagram shows:

• Reactants at 40 kJ/mol
• Products at 110 kJ/mol
• Peak of curve at 190 kJ/mol

What are the enthalpy change,

\Delta H

, and activation energy,

E_a

, for the forward reaction?

$\Delta H = -70$ kJ/mol, $E_a = 150$ kJ/mol
$\Delta H = +70$ kJ/mol, $E_a = 150$ kJ/mol
$\Delta H = -70$ kJ/mol, $E_a = 230$ kJ/mol
$\Delta H = +70$ kJ/mol, $E_a = 230$ kJ/mol

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