Leah Firmstone
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GCSE Chemistry Test sobre C7 Quiz - Energetics, creado por Leah Firmstone el 15/02/2016.

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Leah Firmstone
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C7 Quiz - Energetics

Pregunta 1 de 5

1

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

Selecciona una de las siguientes respuestas posibles:

  • ...exothermic reactions

  • ...endothermic reactions

  • ...redox reactions

Explicación

Pregunta 2 de 5

1

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

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación

Pregunta 3 de 5

1

What is 'activation energy'?

Selecciona una de las siguientes respuestas posibles:

  • The overall energy change of a reaction.

  • The energy needed to start a chemical reaction.

  • A measure of the strength of a catalyst.

Explicación

Pregunta 4 de 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 .

Arrastra y suelta para completar el texto.

    requires
    Making
    exothermic
    endothermic
    released
    break
    less
    reactants

Explicación

Pregunta 5 de 5

1

The diagram shows an endothermic reaction.

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación