Chemistry - Key Stage 4 - Whiteboard presentation - Multimedia lesson

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Endothermic and exothermic reactions
Subject: Chemistry
Level: Key Stage 4
Resource type: Whiteboard presentation
Teaching type: Multimedia lesson

Description

At the end of this activity, students should be able to:
– describe the phenomenon of energy transfer in a chemical reaction
– define exothermic and endothermic reactions
– identify exothermic and endothermic reactions
– draw energy diagrams
– do simple calculations associated with energy transfer during a chemical reaction.

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Resources Structure Key Stage 4 Chemistry XIII. Chemical reactions 63. Endothermic and exothermic reactions Exam Specifications Key Stage 4 AQA GCSE Science A (4461) Chemistry III. Additional materials 1. Additional materials Additional materials AQA GCSE Additional Science (4463) Chemistry I. Chemistry 2 5. Do chemical reactions always release energy? When chemical reactions occur, energy is transferred to or from the surroundings. An exothermic reaction is one that transfers energy, often as heat, to the surroundings. Examples of exothermic reactions include combustion, many oxidation reactions and neutralisation. An endothermic reaction is one that takes in energy, often as heat, from the surroundings. Endothermic reactions include thermal decompositions. AQA GCSE Chemistry (4421) II. Chemistry 2 20. Do chemical reactions always release energy? When chemical reactions occur, energy is transferred to or from the surroundings. An exothermic reaction is one that transfers energy, often as heat, to the surroundings. Examples of exothermic reactions include combustion, many oxidation reactions and neutralisation. An endothermic reaction is one that takes in energy, often as heat, from the surroundings. Endothermic reactions include thermal decompositions. III. Chemistry 3 25. How much energy is involved in chemical reactions? In an exothermic reaction, the energy released from forming new bonds is greater than the energy needed to break existing bonds. In an endothermic reaction, the energy needed to break existing bonds is greater than the energy released from forming new bonds. During a chemical reaction: − energy must be supplied to break bonds − energy is released when bonds are formed. These changes can be represented on an energy level diagram.

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YDP SA

Keywords
reaction, energy, bond, endothermic, exothermic, reactions, enthalpy, transmition, activation, endothermic and exothermic reactions

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Endothermic and exothermic reactions

Type: Whiteboard presentation

School licence till: 23/05/2013

Price: 5.00 GBP

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This resource belongs to the following Packs:

Chemistry – Key Stage 4

School licence till: 23/05/2013

Price: 349.00 GBP (excl. VAT)

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