Edexcel (9-1) Topic 7

Questão 1 de 12

1

Which shows the correct reaction profile for an endothermic reaction?

Selecione uma das seguintes:

Explicação

Questão 2 de 12

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

higher

lower

Explicação

Questão 3 de 12

1

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

Selecione uma das seguintes:

exothermic
endothermic

Explicação

Questão 4 de 12

1

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 5 de 12

1

Which line represents the fastest overall reaction?

Selecione uma das seguintes:

A
B
C

Explicação

Questão 6 de 12

1

Select the correct statement about how the rate changes during the reaction.

Selecione uma das seguintes:

it increases from zero
it increases, then decreases to zero
it decreases to zero
it stays the same

Explicação

Questão 7 de 12

1

Select all the factors that can change the rate of reaction. (hint: there's more than one)

Selecione uma ou mais das seguintes:

pressure
volume
concentration
catalysts
temperature
surface area
height
size of container

Explicação

Questão 8 de 12

1

Preencha o espaço em branco para completar o texto.

Using data from the table, what was the mean rate of reaction?

cm3/s

Explicação

Questão 9 de 12

1

The activation energy for a reaction was measured with and without a catalyst. Select the value that was the value for the catalysed reaction.

Selecione uma das seguintes:

55 kJ/mol
72 kJ/mol

Explicação

Questão 10 de 12

1

Increasing the ❌ of reactants frees up more particles that are available to ❌ right away. This doesn't add more particles in to the reaction, it only allows particles that would have once had to wait for other particles to ❌ first to be available. This leads to more ❌, successful collisions and so the rate of reaction increases.

Arraste e solte para completar o texto.

collide

react

frequent

surface area

concentration

temperature

Explicação

Questão 11 de 12

1

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

Selecione uma das seguintes:

electrolysis
photosynthesis
thermal decomposition
combustion

Explicação

Questão 12 de 12

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

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GCSE Chemistry (Edexcel) Quiz sobre Edexcel (9-1) Topic 7, criado por https:// revisechemistry.uk em 23-03-2018.

Edexcel (9-1) Topic 7

Edexcel (9-1) Topic 7

Questão 1 de 12

Which shows the correct reaction profile for an endothermic reaction?

Selecione uma das seguintes:

Explicação

Questão 2 de 12

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 3 de 12

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

Selecione uma das seguintes:

Explicação

Questão 4 de 12

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 5 de 12

Which line represents the fastest overall reaction?

Selecione uma das seguintes:

Explicação

Questão 6 de 12

Select the correct statement about how the rate changes during the reaction.

Selecione uma das seguintes:

Explicação

Questão 7 de 12

Select all the factors that can change the rate of reaction. (hint: there's more than one)

Selecione uma ou mais das seguintes:

Explicação

Questão 8 de 12

Preencha o espaço em branco para completar o texto.

Using data from the table, what was the mean rate of reaction? cm3/s

Explicação

Questão 9 de 12

The activation energy for a reaction was measured with and without a catalyst. Select the value that was the value for the catalysed reaction.

Selecione uma das seguintes:

Explicação

Questão 10 de 12

Arraste e solte para completar o texto.

Explicação

Questão 11 de 12

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

Selecione uma das seguintes:

Explicação

Questão 12 de 12

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

Using data from the table, what was the mean rate of reaction?

cm3/s

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