Quiz
C7 Quiz - Energetics
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Perguntas do quiz (5)
1Reactions that give out energy - usually in the form of heat - are called...
- A...exothermic reactions
- B...endothermic reactions
- C...redox reactions
2Reactions that take in energy from the surroundings - usually in the form of heat - are called endothermic reactions.
- AVerdadeiro
- BFalso
3What is 'activation energy'?
- AThe overall energy change of a reaction.
- BThe energy needed to start a chemical reaction.
- CA measure of the strength of a catalyst.
4Breaking the chemical bonds in the reactants always [blank_start]requires[blank_end] energy – it is an endothermic process. [blank_start]Making[blank_end] new bonds in the products always releases energy – it is an exothermic process.
If more energy is [blank_start]released[blank_end] when new bonds are made than was absorbed to [blank_start]break[blank_end] the bonds in the reactants, then the reaction is [blank_start]exothermic[blank_end].
If [blank_start]less[blank_end] energy is released when new bonds are made than was absorbed to break the bonds in the [blank_start]reactants[blank_end], then the reaction is [blank_start]endothermic[blank_end].- Arequires
- BMaking
- Cexothermic
- Dendothermic
- Ereleased
- Fbreak
- Gless
- Hreactants
5The diagram shows an endothermic reaction.
- AVerdadeiro
- BFalso
Informações
- Descrição
- GCSE Chemistry Quiz sobre C7 Quiz - Energetics, criado por Leah Firmstone em 15-02-2016.
- Autor
- Leah Firmstone
- Idioma
- English
- Visualizações
- 555
- Etiquetas
- Avaliação
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