Leah Firmstone
Quiz por , criado more than 1 year ago

GCSE Chemistry Quiz sobre C7 Quiz - Energetics, criado por Leah Firmstone em 15-02-2016.

382
6
0
Leah Firmstone
Criado por Leah Firmstone mais de 8 anos atrás
Fechar

C7 Quiz - Energetics

Questão 1 de 5

1

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

Selecione uma das seguintes:

  • ...exothermic reactions

  • ...endothermic reactions

  • ...redox reactions

Explicação

Questão 2 de 5

1

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

Selecione uma das opções:

  • VERDADEIRO
  • FALSO

Explicação

Questão 3 de 5

1

What is 'activation energy'?

Selecione uma das seguintes:

  • The overall energy change of a reaction.

  • The energy needed to start a chemical reaction.

  • A measure of the strength of a catalyst.

Explicação

Questão 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 .

Arraste e solte para completar o texto.

    requires
    Making
    exothermic
    endothermic
    released
    break
    less
    reactants

Explicação

Questão 5 de 5

1

The diagram shows an endothermic reaction.

Selecione uma das opções:

  • VERDADEIRO
  • FALSO

Explicação