Breaking and making bonds
Quiz by Oak National Academy: GCSE Chemistry AQA Higher
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6 questions
Show answers
- Q1What does an energy profile diagram show?the mass changes during a reactionthe energy changes during a chemical reactionthe temperature changes during a reaction30s
- Q2What occurs during a chemical reaction?Substances are mixed without a reaction.Atoms are rearranged and chemical bonds are broken/formed.The state of matter is changed.30s
- Q3What is an exothermic reaction?a reaction that absorbs energy from the surroundingsa reaction that does not involve energy changea reaction where energy is transferred from the reactants to the surrounding30s
- Q4What is an endothermic reaction?a reaction that releases energy to the surroundingsa reaction in which energy is transferred from the surroundings to the productsa reaction that does not involve energy change30s
- Q5What is activation energy?the minimum energy that the particles must have in order to reactthe energy stored in reactantsthe energy released during a reaction30s
- Q6In which energy profile, does the blue arrow show the energy change of a exothermic reaction?30s
