Specification Point 3.14C (Paper 2C Only):
Draw and explain reaction profile diagrams showing △ h and activation energy
The Effect of a Catalyst on Activation Energy & Enthalpy Change
Catalyst: A substance that increases the rate of a reaction, but is chemically unchanged at the end of the reaction
- The catalyst will provide an alternative pathway requiring lower activation energy so more colliding particles will have the necessary activation energy to react
- This will allow more frequent and successful collisions per second, increasing the rate of reaction
Energy level diagram:
The effect of a catalyst on the activation energy and enthalpy change
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Jamie got a First class degree in Chemistry from Oxford University before going on to teach chemistry full time as a professional tutor. He’s put together these handy revision notes to match the Edexcel IGCSE Chemistry specification so you can learn exactly what you need to know for your exams.
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