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Worksheets9.1 Energy changes in chemical reactions
Total questions: 17
Worksheet time: 9mins
Reactions that release, or give out, heat are called ..............................................
endothermic.
exothermic.
Reactions or changes that take in heat from the surroundings are called ................................... reactions.
endothermic.
exothermic.
Melting is considered an............................................... process.
endothermic.
exothermic.
Evaporation is considered an............................................... process.
endothermic.
exothermic.
Mixing dilute hydrochloric acid and sodium hydroxide is an.......................................reaction/process.
endothermic.
exothermic.
Mixing sodium hydrogen carbonate with citric acid is an.......................................reaction/process.
endothermic.
exothermic.
Dissolving ammonium chloride is an .................................... process.
endothermic.
exothermic.
Dissolving potassium nitrate is an .................................... process.
endothermic.
exothermic.
Dissolving copper sulfate is an .................................... process.
endothermic.
exothermic.
Dissolving ammonium nitrate is an .................................... process.
endothermic.
exothermic.
Which of the following releases heat?
Melting.
Endothermic reactions
Burning reactions.
Evaporation.
Which of the following can be exothermic or endothermic.?
Melting.
Dissolving.
Burning reactions.
Evaporation.
All chemical reactions and changes of state involve energy changes.
True.
False.
All neutralisation reactions are exothermic.
True.
False.
Most neutralisation reactions are endothermic.
True.
False.
What do we use to work out whether a change is exothermic or endothermic?
Weight changes.
Density changes.
Temperature changes.
A reaction in which an acid and a base react to form water and salt.
Burning.
Neutralisation.
Oxidation.
