NEW
Font size
WorksheetsC5 Energy Quiz
Total questions: 18
Worksheet time: 36mins
The substances present BEFORE a reaction occurs are called______.
Products
Exponents
Factors
Reactants
What is the substance present at the END of a reaction called?
Product
Exponent
Integer
Reactant
In EXOTHERMIC reactions, energy is _____ from the reaction to the surroundings.
Absorbed
Released
Eliminated
Evaporated
In ENDOTHERMIC reactions, energy is _____ by the reaction system from the surroundings.
Absorbed
Released
Eliminated
Obliterated
If the starting temperature of a reaction was 21°C and the ending temperature was 44°C, what type of reaction occurred?
Exothermic
Endothermic
A chemist is doing an endothermic reaction. The starting temperature was 25 °C. Which of the following would be a reasonable ending temperature?
44 degrees
30 degrees
15 degrees
25 degrees
Dissolving ammonium nitrate is an example of what type of reaction?
endothermic
exothermic
Neutralisation reactions are an example of what type of reaction?
endothermic
exothermic
Calculate the energy change in this reaction. You will need a pen, paper and calculator!
+ 160 kJ
-63 kJ
- 168 kJ
+217 kJ
Bond making is...
Endothermic
Exothermic
Neither
Both
Bond breaking is...
Exothermic
Endothermic
Both
Neither
The minimum energy particles must have to react is the
acting energy
active energy
activation energy
Which letter shows the activation energy
A
B
C
If the energy required to break bonds is less than the energy released when bonds are made, what type of reaction is this?
Exothermic
Endothermic
This is the energy profile of which type of reaction?
Endothermic
Exothermic
Neither
This is the energy profile of which type of reaction?
Endothermic
Exothermic
Neither
