Breaking and making bonds
Quiz by Oak National Academy: GCSE Chemistry OCR Foundation
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6 questions
Show answers
- Q1What does an energy profile diagram show?the temperature changes during a reactionthe mass changes during a reactionthe energy changes during a chemical reaction30s
- Q2What occurs during a chemical reaction?The state of matter is changed.Atoms are rearranged and chemical bonds are broken/formed.Substances are mixed without a reaction.30s
- Q3What is an exothermic reaction?a reaction that absorbs energy from the surroundingsa reaction where energy is transferred from the reactants to the surroundinga reaction that does not involve energy change30s
- Q4What is an endothermic reaction?a reaction that does not involve energy changea reaction in which energy is transferred from the surroundings to the productsa reaction that releases energy to the surroundings30s
- Q5What is activation energy?the energy stored in reactantsthe minimum energy that the particles must have in order to reactthe energy released during a reaction30s
- Q6In which energy profile, does the blue arrow show the energy change of a exothermic reaction?30s
