Leah Firmstone
Quiz von , erstellt am more than 1 year ago

GCSE Chemistry Quiz am C7 Quiz - Energetics, erstellt von Leah Firmstone am 15/02/2016.

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Leah Firmstone
Erstellt von Leah Firmstone vor mehr als 8 Jahre
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C7 Quiz - Energetics

Frage 1 von 5

1

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

Wähle eine der folgenden:

  • ...exothermic reactions

  • ...endothermic reactions

  • ...redox reactions

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Frage 2 von 5

1

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

Wähle eins der folgenden:

  • WAHR
  • FALSCH

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Frage 3 von 5

1

What is 'activation energy'?

Wähle eine der folgenden:

  • The overall energy change of a reaction.

  • The energy needed to start a chemical reaction.

  • A measure of the strength of a catalyst.

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Frage 4 von 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 .

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    requires
    Making
    exothermic
    endothermic
    released
    break
    less
    reactants

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Frage 5 von 5

1

The diagram shows an endothermic reaction.

Wähle eins der folgenden:

  • WAHR
  • FALSCH

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