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WorksheetsChemical Energetics-grade 10
Total questions: 10
Worksheet time: 8mins
Heat is taken in when ammonium nitrate dissolves in water. This is an example of?
Thermal decomposition
Endothermic change
Exothermic change
Electrolysis
Which of the following energy changes corresponds to the activation energy required for the forward reaction to take place?
A
C
B
E
Which of the following is true about the formation of bonds between molecules?
Energy is given off when bonds are formed between molecules.
Energy is absorbed by the molecule when bonds are formed.
Energy is neither given off nor absorbed when bonds are formed.
The energy level diagram for the reaction between magnesium and hydrochloric acid is shown.
Energy is given out during the reaction
The products are at a lower energy level than the reactants
The reaction is endothermic.
Which is an endothermic process?
Burning hydrogen
Distilling petroleum
Reacting potassium with water
Using petrol in a motor car engine
Exothermic reactions feel
warm
cold
What type of reaction is this?
Exothermic
Endothermic
Energy Producing
No way to tell
