Energy Profile Diagrams
Chemistry ⇒ Thermochemistry and Energetics
Energy Profile Diagrams starts at 11 and continues till grade 12.
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A reaction has an activation energy of 60 kJ/mol and a ΔH of -20 kJ/mol. What is the activation energy for the reverse reaction?
A reaction has an activation energy of 75 kJ/mol and a ΔH of +20 kJ/mol. Is the reaction endothermic or exothermic?
A reaction has reactants at 120 kJ, a transition state at 200 kJ, and products at 80 kJ. Calculate the enthalpy change (ΔH).
A reaction has reactants at 200 kJ, a transition state at 350 kJ, and products at 150 kJ. What is the activation energy?
Describe how a catalyst affects the energy profile diagram of a chemical reaction.
Describe how the energy profile diagram would change if a reaction is made more exothermic.
Describe the difference between the energy profile diagrams of a single-step and a multi-step reaction.
Explain the significance of the area under the curve in an energy profile diagram.
Explain why a reaction with a high activation energy is generally slower than one with a low activation energy.
Explain why the activation energy for the reverse reaction is different from that of the forward reaction in an exothermic process.
Explain why the activation energy is important in chemical reactions.
If a catalyst lowers the activation energy from 80 kJ/mol to 40 kJ/mol, by how much has the activation energy decreased?
If the activation energy for a reaction is 50 kJ/mol and the enthalpy change is -30 kJ/mol, what is the energy difference between the transition state and the products?
In an exothermic reaction, is the energy of the products higher or lower than that of the reactants?
The energy profile diagram for a reaction shows a single peak. What does this indicate about the reaction mechanism?
The energy profile diagram for a reaction shows two peaks and one valley between them. What does the valley represent?
The energy profile diagram for a two-step reaction shows two peaks. What does each peak represent?
The enthalpy change (ΔH) for a reaction is -100 kJ/mol. What does this indicate about the reaction?
What does the peak of an energy profile diagram represent?
