AQA (9-1) Topic 5

Questão 1 de 8

1

Preencha o espaço em branco para completar o texto.

Oxygen and hydrogen will not react until a lighted splint is used. This is because must be supplied to the reaction to start it.

Explicação

Questão 2 de 8

1

Two solutions are added together. The temperature goes down. What type of reaction is this?

Selecione uma das seguintes:

exothermic
endothermic

Explicação

Questão 3 de 8

1

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The temperature of 50 ml acid, in a 100 ml beaker was 18 Celsius. 2 g of calcium carbonate was added, and when it finished reacting the temperature was now 42 Celsius. The temperature change was Celsius.

Explicação

Questão 4 de 8

1

Preencha o espaço em branco para completar o texto.

Using the given bond energies, calculate the overall energy change of this reaction. (remember that bond breaking is a positive energy process [requires energy], and bond making is a negative energy process [releases energy]).

Overall energy change is kJ/mol

Explicação

Questão 5 de 8

1

Bonding breaking is an ❌ process, whilst bond making is an ❌ process. In an exothermic reaction, the energy release from forming bonds is ❌ than the energy used to break them.

Arraste e solte para completar o texto.

endothermic

exothermic

greater

smaller

Explicação

Questão 6 de 8

1

Which shows the correct reaction profile for an endothermic reaction?

Selecione uma das seguintes:

Explicação

Questão 7 de 8

1

Which of the following is not an example of an endothermic reaction?

Selecione uma das seguintes:

electrolysis
combustion
photosynthesis
thermal decomposition

Explicação

Questão 8 de 8

1

If the energy change of a reaction has a positive (+) value, then the energy change is ❌; if is has a negative (-) value, then the change is ❌

Arraste e solte para completar o texto.

endothermic

exothermic

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GCSE Chemistry (AQA) Quiz sobre AQA (9-1) Topic 5, criado por https:// revisechemistry.uk em 12-02-2018.

AQA (9-1) Topic 5

Questão 1 de 8

Preencha o espaço em branco para completar o texto.

Oxygen and hydrogen will not react until a lighted splint is used. This is because must be supplied to the reaction to start it.

Explicação

Questão 2 de 8

Two solutions are added together. The temperature goes down. What type of reaction is this?

Selecione uma das seguintes:

Explicação

Questão 3 de 8

Preencha o espaço em branco para completar o texto.

The temperature of 50 ml acid, in a 100 ml beaker was 18 Celsius. 2 g of calcium carbonate was added, and when it finished reacting the temperature was now 42 Celsius. The temperature change was Celsius.

Explicação

Questão 4 de 8

Preencha o espaço em branco para completar o texto.

Using the given bond energies, calculate the overall energy change of this reaction. (remember that bond breaking is a positive energy process [requires energy], and bond making is a negative energy process [releases energy]). Overall energy change is kJ/mol

Explicação

Questão 5 de 8

Bonding breaking is an ❌ process, whilst bond making is an ❌ process. In an exothermic reaction, the energy release from forming bonds is ❌ than the energy used to break them.

Arraste e solte para completar o texto.

Explicação

Questão 6 de 8

Which shows the correct reaction profile for an endothermic reaction?

Selecione uma das seguintes:

Explicação

Questão 7 de 8

Which of the following is not an example of an endothermic reaction?

Selecione uma das seguintes:

Explicação

Questão 8 de 8

If the energy change of a reaction has a positive (+) value, then the energy change is ❌; if is has a negative (-) value, then the change is ❌

Arraste e solte para completar o texto.

Explicação

Using the given bond energies, calculate the overall energy change of this reaction. (remember that bond breaking is a positive energy process [requires energy], and bond making is a negative energy process [releases energy]).

Overall energy change is kJ/mol