Chemistry / Energy Diagram
• Solutions 18
Question

Part A

What is the value of the activation energy of the uncatalyzed reaction?

Express your answer to three significant figures and include the appropriate units.

Part B

What is the value of the enthalpy change of the uncatalyzed reaction?

Express your answer to three significant figures and include the appropriate units.

Part C

What is the value of the activation energy of the uncatalyzed reaction in reverse?

Part D

What is the value of the enthalpy change of the uncatalyzed reaction in reverse?

Express your answer to three significant figures and include the appropriate units.

Solution: Part AWhat is the value of the activation energy of the unca...

$\underline{Part A:}$

$E_a = E\ transition\ state - E\ reactant$

$E_a = 400 kJ - 225 kJ = 175 kJ$

$\underline{Part B:}$

$ΔH= energy\ of\ products - energy\ of\ reactants$

$ΔH= 100 kJ - 225 kJ = -125 kJ$

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