8209685
Beschreibung
Karteikarten von Bethany Westwood, aktualisiert more than 1 year ago
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Erstellt von Bethany Westwood
vor etwa 7 Jahre
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| Frage | Antworten |
| Why do we measure energy? | - Measure energy values of fuels - Find the energy required and released when making and breaking bonds - Energy requirement for industrial process - Predict whether or not a reaction will take place |
| What forms does energy take? | - Light - Heat - Electrical |
| What is thermochemistry? | Thermochemistry is the study of heat changes during a chemical reaction. |
| Where does energy go when bonds are made and broken? | Bonds made - Energy given out Bonds broken - Energy taken in |
| What makes a reaction exo or endo thermic? | The overall change in energy determines whether energy has been lost overall (Exothermic) or whether energy has been absorbed over all (endothermic) |
| An example of an Exothermic reaction? | Neutralization reaction with an acid and alkali |
| Example of an endothermic reaction? | - Calcium carbonate > calcium oxide and carbon dioxide - Blue copper sulfate > white anyhydrous copper sulfate and water |
| What happens if a reaction is endothermic and it is reversed? | It becomes exothermic and vise versa |
| What does the energy in a reaction depend on? | The quantity of the reactants |
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