What are the enthalpy change of solution and enthalpy change of hydration definitions? What are the trends in hydration energies? What is the difference between lattice enthalpy of formation and lattice enthalpy of dissociation? All this and more covered in this comprehensive lesson with questions and answers! 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 – Hinge question: what is the melting point of sodium chloride?
Slide 4 – Answer to this question (801℃!)
Slide 5 – 9: Explores the mystery of the dissolving of sodium chloride. 801℃ worth of energy must be supplied to break the forces of attraction in the lattice. If all this energy came from the water, the water would freeze! So where does this energy come from?
Slide 10: Introduction to the three factors which solve the mystery (Lattice energy (of dissociation/formation), Enthalpy change of hydration and Enthalpy change of solution
Slide 11: Definitions of both lattice enthalpy of formation and lattice enthalpy of dissociation are given
Slide 12: What is enthalpy change of hydration?
Slide 13: Y12 Recap Quiz covering points that students may have forgotten from Topic 7 (Intermolecular Forces) about the interactions between a salt and a water molecule
Slides 14 – 17: Trends in hydration energies covered in detail on these slides
Slides 18 – 21: Introduces enthalpy change of solution, along with its definition and how it links to enthalpy change of hydration and lattice dissociation enthalpy in a Born-Haber cycle.
Slide 22 – ALT (Applied Learning Time): an independent practice task, where students must draw an energy cycle and find an omitted hydration energy
Slide 23 - be able to use entropy and enthalpy changes of solution values to predict the solubility of ionic compounds
Slides 24 – 30: Exam questions with mark scheme answers (included with the resource)
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Edexcel International A level Chemistry - lessons with questions and answers | Topic 12B | Lattice Energy
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Edexcel International A level Chemistry - lessons with questions and answers | Topic 12 | Entropy and Energetics
Bundle is comprised of 6 PowerPoint lessons covering Topic 12 – Entropy and Energetics for the Edexcel International A level Chemistry course, Unit 4 – WCH14, but it can be used for all UK exam boards which have Entropy and Energetics units. The PowerPoints are as follows: 1. Entropy Introduction 2. Total Entropy Change 3. Understanding Entropy Changes 4. Lattice Energy and Born-Haber Cycles 5. Experimental and Theoretical Lattice Energies 6. Enthalpy Changes of Hydration and Solution Each lesson is exactly that . . . a lesson. There is a starter slide, lesson objectives slide, introduction of new knowledge slides, worked examples and then opportunities for students to try independent practice through mini plenary tasks comprised of several questions of graded difficulties. Questions are interspersed through the lessons at regular intervals and always have answers that animate on to the screen when you click. THESE ARE NOT THE INFORMATION ONLY TYPE SLIDES THAT SOME PEOPLE SELL, which are useless for delivering a lesson. We are a team of teachers, and these lessons have been made by actual Chemistry teachers who currently teach in secondary schools in England. We know exactly what you need, trust me. Every lesson has exam questions included as word documents which were made using Exam wizard. The mark scheme is at the end of each exam question and the answers have been screen shotted and pasted into the PowerPoint at the end. All the slides in every lesson are fully animated and include answers to every mini plenary question and exam question. If you have a positive experience with the bundle, please leave a positive review! This really helps promote our store!
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a very well sequenced lesson. thanks
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