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     • Students measure the temperature changes in different reactions taking place in a polystyrene cup, classifying the reactions as exothermic or endothermic. The experiments can also be used to revise different types of chemical reaction and, with some classes, chemical formulae and equations.
     Reference:

     Exothermic or endothermic? Classifying reactions | Experiment ...

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   How do you know if a chemical reaction is exothermic or endothermic?

   • The changes in energy that occur during a chemical reaction can be seen by examining the changes in chemical bonding. This can be used to classify reactions as exothermic or endothermic. When a chemical reaction occurs, energy is transferred to or from the surroundings. There is usually a temperature change.

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   Which chemical reaction releases more energy – exothermic or endothermic?

   • Chemical reactions that release energy are called exothermic. In exothermic reactions, more energy is released when the bonds are formed in the products than is used to break the bonds in the reactants. Chemical reactions that absorb (or use) energy are called endothermic.

   Exothermic, Endothermic, & Chemical Change | Energy Foundations for

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   What is the difference between exothermic and endothermic reactions?

   • When energy is transferred to the surroundings, this is called an exothermic reaction and usually feels hot. When energy is taken in from the surroundings, this is called an endothermic reaction and usually feel cold. Can you think of any everyday reactions that either release energy into the surroundings or absorb it?

   What are exothermic and endothermic reactions? - BBC Bitesize

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   Why is respiration an exothermic reaction?

   • Respiration is an exothermic reaction because it releases energy. Remember, not all exothermic reactions release energy as heat. Endothermic reactions absorb energy from the surroundings. This energy is usually absorbed as heat, so the surroundings get colder.

   What are exothermic and endothermic reactions? - BBC Bitesize

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   How do endothermic reactions work?

   • In endothermic reactions the surroundings lose energy, which is gained by the chemicals themselves. Students can be asked to draw simple energy diagrams for each type of reaction. It may be necessary to provide an introduction to explain the conventions of energy-level diagrams.

   Exothermic or endothermic? Classifying reactions - RSC Education

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   What are exothermic reactions?

   • These are reactions that transfer energy to the surroundings (ie the energy ex its from the reaction, hence the name ex othermic). The energy is usually transferred as heat energy, causing the reaction mixture and its surroundings to become hotter. A thermometer is used to detect the temperature increase. Some examples of exothermic reactions are:

   Exothermic and endothermic reactions - Energy changes in chemical ... …

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3. www.education.com › science-fair › articleEndothermic and Exothermic Reactions Experiment | Science ...

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   Every chemical reaction that exists is one of two things: endothermic or exothermic. The Greek root therm means temperature or heat, which gives us a clue about all reactions: there is energy exchange! Endo means "within" while exo means "outside," so these types of reactions are opposite.

4. www.bbc.co.uk › bitesize › articlesWhat are exothermic and endothermic reactions? - BBC Bitesize

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   Revise and understand what endothermic and exothermic reactions are and how the two reactions affect energy transfer to or from their surroundings.

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6. www.bbc.co.uk › bitesize › guidesExothermic and endothermic reactions - Energy changes in ...

   www.bbc.co.uk › bitesize › guides

   The changes in energy that occur during a chemical reaction can be seen by examining the changes in chemical bonding. This can be used to classify reactions as exothermic or endothermic.

7. edu.rsc.org › experiments › exothermic-orExothermic or endothermic? Classifying reactions | Experiment ...

   edu.rsc.org › experiments › exothermic-or

   Students measure the temperature changes in different reactions taking place in a polystyrene cup, classifying the reactions as exothermic or endothermic. The experiments can also be used to revise different types of chemical reaction and, with some classes, chemical formulae and equations.

8. Videos

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     Endothermic and Exothermic Reactions

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     demonstration of exothermic and endothermic reactions

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     exothermic and endothermic reaction demonstrations

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9. highschoolenergy.acs.org › how-can-energy-changeExothermic, Endothermic, & Chemical Change - Foundations

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   In this investigation, students classify chemical reactions as exothermic or endothermic. Next, students explore the relationship between an observed change in temperature and the classification of a change as chemical or physical.

10. www.thenational.academy › teachers › programmesLesson: Energy changes in reactions | Foundation | AQA | KS4 ...

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    Endothermic - An endothermic chemical reaction is a type of reaction in which energy is transferred from the surroundings to the products e.g. photosynthesis. Solution - A solution is formed when a substance dissolves into a liquid. Calorimetry - Calorimetry is an experiment than can be used to measure an energy change during a reaction.

11. www.bbc.co.uk › bitesize › guidesExothermic and endothermic reactions - AQA Temperature ... - BBC

    www.bbc.co.uk › bitesize › guides

    Exothermic reactions transfer energy to the surroundings and the temperature of the surroundings increases. Endothermic reactions take in energy and the temperature of the surroundings...