Leah Firmstone
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GCSE Chemistry Quiz on C7 Quiz - Energetics, created by Leah Firmstone on 15/02/2016.

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Leah Firmstone
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C7 Quiz - Energetics

Question 1 of 5

1

Reactions that give out energy - usually in the form of heat - are called...

Select one of the following:

  • ...exothermic reactions

  • ...endothermic reactions

  • ...redox reactions

Explanation

Question 2 of 5

1

Reactions that take in energy from the surroundings - usually in the form of heat - are called endothermic reactions.

Select one of the following:

  • True
  • False

Explanation

Question 3 of 5

1

What is 'activation energy'?

Select one of the following:

  • The overall energy change of a reaction.

  • The energy needed to start a chemical reaction.

  • A measure of the strength of a catalyst.

Explanation

Question 4 of 5

1

Breaking the chemical bonds in the reactants always energy – it is an endothermic process. new bonds in the products always releases energy – it is an exothermic process.

If more energy is when new bonds are made than was absorbed to the bonds in the reactants, then the reaction is .

If energy is released when new bonds are made than was absorbed to break the bonds in the , then the reaction is .

Drag and drop to complete the text.

    requires
    Making
    exothermic
    endothermic
    released
    break
    less
    reactants

Explanation

Question 5 of 5

1

The diagram shows an endothermic reaction.

Select one of the following:

  • True
  • False

Explanation