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Chemistry
exothermic and endothermic reactions
Exothermic and endothermic reactions explained for GCSE students: Energy transfers in chemical processes.
15/11/2022
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Exothermic and endothermic reactions explained for GCSE students: Energy transfers in chemical processes.
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This page provides a comprehensive overview of exothermic and endothermic reactions, crucial concepts in GCSE chemistry. It explains the energy transfers involved in these reactions and their impact on surroundings.
Exothermic Reactions Explained
Exothermic reactions are chemical processes where energy is transferred from the reactants to the surroundings. This results in an increase in the temperature of the surrounding environment.
Definition: An exothermic reaction is one in which energy is released from the chemical bonds of the reactants to the surroundings.
The energy diagram for an exothermic reaction shows that the products have lower energy than the reactants, with the difference being released as heat.
Example: Neutralization reactions, such as the reaction between an acid and a base, are always exothermic.
Endothermic Reactions Explained
Conversely, endothermic reactions absorb energy from the surroundings, leading to a decrease in the surrounding temperature.
Definition: An endothermic reaction is one in which energy is transferred from the surroundings to the chemical bonds of the products.
The energy diagram for an endothermic reaction illustrates that the products have higher energy than the reactants, with the difference being absorbed from the surroundings.
Example: The dissolution of ammonium chloride in water is an endothermic process.
Energy Diagrams and Activation Energy
Both types of reactions involve an activation energy, which is the minimum energy required for the reaction to occur.
Highlight: The overall energy change in a reaction is the difference between the energy of the products and the energy of the reactants.
Examples of Exothermic and Endothermic Reactions
The page provides several examples of reactions and their classifications:
Vocabulary: Precipitation reactions involve the formation of an insoluble solid from two soluble substances.
Understanding these concepts is crucial for students studying exothermic and endothermic reactions for GCSE. The energy transfers in chemical reactions are fundamental to explaining many everyday phenomena and industrial processes.
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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
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This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
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Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
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Best app on earth! no words because it’s too good
Thomas R
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Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
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This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
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The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
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In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
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very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
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I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
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THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
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This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
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