(Pre-Test grades on Energy Changes by Chemistry Class)
Energy Changes, also commonly known as Endothermic & Exothermic Reactions – is one of those topics in GCE O-Level Chemistry (as well as IB and IP Chemistry syllabus) that does not require chemistry students to do much of memorising. However, many chemistry students find this topic difficult to even pass, not to mention scoring in chemistry exams. Why so?
I was not alarmed when i was marking the Pre-Test papers that were given to one of my Chemistry Weekly Classes. All 14 of them in this particular class (coming from a total of 12 Singapore Secondary Schools) did not manage to even pass the test, even though they have learned it from their school teachers several weeks / months ago. Every year, i will see different batches of GCE O-Level students as well as IP chemistry students struggling to pass this topic. Why so?
Energy Changes is a chemistry topic that requires you to have a good understanding of the essential chemistry concepts and applying it to answering application challenging questions. Memorising is generally not required here.
Let’s do a quick definition of the key terms involved in this topic: [Read more…] about O Level Chemistry: Common Errors in Energy Changes (Endothermic / Exothermic)