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Worksheets6.4.1 Exothermic and endothermic reactions
Total questions: 12
Worksheet time: 11mins
True or false: A change in state is a chemical reaction
True - something melting would be an example of a chemical reaction
False - a change in state is a physical change
What term is given to a reaction which transfers heat energy to the surroundings?
Endothermic
Reversible
Exothermic
Exotermic
When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases. What kind of reaction is this?
Endothermic
Decomposition
Exothermic
Indothermic
When calcium reacts with water, the temperature changes from 18°C to 39°C. Which statement is correct?
The solution at the end is acidic
The reaction is reversible
The reaction is exothermic
The reaction is endothermic
if more heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants
Exothermic
Endothermic
Exotermic
Endotermic
if less heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants
Endothermic
Exotermic
Exothermic
Entrothermic
Which is NOT an example of something you could observe that would suggest a chemical reaction is taking place?
melting
fizzing
smells
temperature change
What instrument would you use to detect an endothermic or exothermic reaction?
triple beam balance
ruler
thermometer
When a candle is lit hydrocarbons are combusting. An exothermic reaction is occuring. Energy is being _________________ .
absorbed
frozen
destroyed
released
