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WorksheetsEnergy Diagrams
Total questions: 10
Worksheet time: 13mins
What is not necessary for a chemical reaction to occur?
molecules must collide in the correct orientation
molecules must have more kinetic energy than the activation energy
molecules need to be stirred
Activation energy - is the amount of energy molecules need to collide with in order for reactions to occur.
True
False
What kind of reaction releases energy or heat
Endothermic
Exothermic
What kind of reaction absorbs energy or heat
Exothermic
Endothermic
What is a catalyst used for in a reaction?
Make it harder for a reaction to occur
stops a reaction from occuring
lowers the energy required to complete a reaction, making it easier
it increases the activation energy
Which letter represents the activation energy for the forward reaction?
B
E
C
D
A
What happens to the change in enthalpy when a catalyst is added?
increases
decreases
remains the same
cannot be determined
What is the ΔH of the forward reaction?
40 kJ
20 kJ
80 kJ
-60 kJ
-20 kJ
Is the forward reaction endothermic or exothermic?
endothermic
exothermic
What is the change of the heat of the reaction (ΔH)?
100 kJ
-175 kJ
-50 kJ
75 kJ
