In this lesson you will learn how to calculate the energy needed to break bonds and the energy released when making bonds. You will learn how to calculate the overall energy change and use this to determine if a reaction is endothermic or exothermic. This lesson is higher tier content, but you can still have a go if you are foundation tier, just don't worry if you don't follow everything. I'll try to make it as straightforward as possible. You will need a pen and paper, and a calculator (scientific preferable, but the one on your phone/PC will be fine too). Please make sure your area is distraction free and you are ready to learn. You will start with a quick quiz to assess your prior knowledge. There will then be a video with some information sharing and tasks for you to complete, followed by a quiz to check your progress. Remember, you can pause the video and even re-try tasks or rewind to hear explanations again. Happy sciencing!