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Worksheetsenergy from chemicals
Total questions: 30
Worksheet time: 45mins
What instrument would you use to detect an endothermic or exothermic reaction?
triple beam balance
ruler
thermometer
During an endothermic reaction, heat is ________ and chemical bonds _______.
released, formed
absorbed, broken
released, broken
absorbed, formed
During an exothermic reaction, heat is _________ and chemical bonds __________.
released, formed
absorbed, broken
released, broken
absorbed, formed
You freeze juice to make ice pops.
exothermic
endothermic
Freezing of ice
Endothermic
Exothermic
Feels cold
Endothermic
Exothermic
Feels warm or hot
Endothermic
Exothermic
Evaporation of sweat
Endothermic
Exothermic
Burning and combustion
Endothermic
Exothermic
Absorbs energy
Endothermic
Exothermic
A melting ice cube is an example of
exothermic
endothermic
none
both
A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?
It is an exothermic reaction
It is an endothermic reaction
6 CO2+ 6 H2O + Energy → C6H12O6 + 6 O2
endothermic reaction
exothermic reaction
5. When ammonium chloride dissolves in water the temperature falls. The type of energy change is described as?
A. exothermic
B. activated
C. decomposition
D. endothermic
6. Which of these processes is always exothermic?
A. evaporation
B. burning
C. insulation
D. melting
In an endothermic reaction, heat is ...
taken in
given out
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
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
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
What type of reaction is this?
Exothermic
Endothermic
Energy Producing
No way to tell
In an endothermic reaction, energy is _________.
absorbed
released
_____ reactions usually feel hot!
endothermic
exothermic
