WorksheetsEnergy from Chemicals
Total questions: 10
Worksheet time: 5mins
Which of the following statements is true?
Bond breaking is exothermic
Bond forming is endothermic
Bond breaking is endothermic
None
How does the addition of a catalyst affect a chemical reaction?
A catalyst lowers the activation energy of a reaction
A catalyst increases the activation energy of a reaction
A catalyst increases the overall enthalpy change of a reaction
A catalyst decreases the overall enthalpy change of a reaction
Which of the following is an example of an exothermic reaction?
Combustion reaction
Dissolving ammonium chloride in water
Photosynthesis
Removing water from hydrated copper (II) sulfate crystals
Which of the following is an example of an endothermic reaction?
Photosynthesis
Neutralisation reactions
Reaction of metals with water
Dissolving sodium hydroxide in water
The ΔH of an exothermic reaction is...
positive
negative
neutral
The ΔH of an endothermic reaction is...
positive
negative
neutral
In an endothermic reaction,
energy needed to break the bonds is greater than energy released on forming new bonds
energy released from forming new bonds is greater than energy needed to break the bonds
In an exothermic reaction,
energy needed to break the bonds is greater than energy released on forming new bonds
energy released from forming new bonds is greater than energy needed to break the bonds
This is an energy profile diagram for an...
exothermic reaction
endothermic reaction
neither
This is an energy profile diagram for an...
endothermic reaction
exothermic reaction
neither
