(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:
- Endothermic Reactions – heat energy is taken into the system (from the surrounding)
- Exothermic Reactions – heat energy is given out to the surrounding (from the system)
It is important to understand what is the System and what is the Surrounding in a given question, given scenario – in order to solve it.
Stay tuned for the blogpost tomorrow! I will start to discuss on the Common Chemistry Errors that students tend to make in Energy Changes.
PS: What do you think? I would love to hear from you. Drop me a comment.
Related Articles:
- O Level Chemistry: Energy Changes (Exo/Endo) & Bond Energy
- O Level Chemistry: Energy Changes – Exothermic & Endothermic Reactions
- O Level Chemistry: Energy Changes (Endothermic & Exothermic Reactions)
- O Level Chemistry: Energy Changes (Exo/Endo) & Bond Energy
- Chemistry Tips: How to Revise for your GCE ‘O’ Level Chemistry Exams
The simplest way to explain chemistry,even for difficult students,I really appreciate your explanation.