51ºÚÁÏ

What is the enthalpy change of formation definition? What is Hess’ law and how do you draw enthalpy cycles? How do you calculate enthalpy change of formation using equations? All this and more covered in this comprehensive lesson with questions and answers! This is a Year 12 A level lesson for Edexcel International Unit 2 – WCH12, 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 – Definition of a enthalpy change of formation
Slide 4 – example equations for the enthalpy change of formation. There is also information on this slide about the enthalpy change of formation of an element
Slides 5 – 6: Build up slides to Hess’ law
Slide 7: Definition of Hess’ law, with a definition
Slides 8 – 12: Worked example 1: Calculating enthalpy change of formation using equations
Slides 13 – 19: Worked example 2 (harder example). All steps of the calculation animate in sequence
Slides 20 – 23: Mini plenary - exam style question with answers that animate onto the screen when you click
Slides 24 - 31: Worked Example 3: Constructing an enthalpy cycle to calculate the enthalpy of reaction
Slides 32 – 35: Worked Example 4 (using combustion data and not formation)
Slides 36 – 45: Exam questions with mark scheme answers (included with the purchase of this resource)

If you have a positive experience with the resource, please leave a positive review! This really helps promote our store! Thanks!