

Arrhenius equation can be used to calculate activation energy for a reaction – students will learn in this lesson! Natural logarithms, Arrhenius plots, finding activation energy from the gradient and the pre-exponential factor from the Y intercept are all explored in this lesson. This is a Year 13 A level lesson for Edexcel International Unit 4 – WCH14, but it can also be used for all UK exam boards. All the slides in this lesson are fully animated and include answers to every mini plenary question and exam question. The breakdown of the slides (which are best opened on Microsoft PowerPoint) is as follows:
Slide 1 - Title and 5-minute starter. The starter is a grid of four questions entitled ‘last week, last lesson, today’s learning and future learning’. Use this generic slide for all of your lessons by simply changing the questions and the answers each time.
Slide 2 - Lesson objectives (see thumbnail image)
Slide 3 – Introduction to logarithms with some simple examples
Slide 4 – full explanation of natural logarithms, including Euler’s number
Slide 5 – transition slide
Slides 6 – 8: Arrhenius equation is introduced, with exposition of all the symbols and units
Slides 9 – 10: A basic approach to the Arrhenius equation, explaining how a high temperature and high Ea affects k
Slides 11 – 12: A more detailed look at the Arrhenius equation, rearranging to make Ea the subject
Slide 13 – Worked example 1: Finding the activation energy by calculation
Slide 14 – 15: Printable format of worked example 1
Slide 16 – 22: detailed explanation, with examples, of how to find the activation energy and the pre-exponential factor graphically
Slides 23 -29 : Exam questions with mark scheme answers (included as a word document with this resource)
Check out my YouTube channel for more lesson previews!
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First rate, good level of detail in all the worked examples. Thanks
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