Edexcel (9-1) Topic 7

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GCSE Chemistry (Edexcel) Quiz on Edexcel (9-1) Topic 7, created by https:// revisechemistry.uk on 03/23/2018.

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https:// revisechemistry.uk
Created by https:// revisechemistry.uk over 1 year ago
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Question 1

Question
Which shows the correct reaction profile for an endothermic reaction?

Question 2

Question
Bonding breaking is an [blank_start]endothermic[blank_end] process, whilst bond making is an [blank_start]exothermic[blank_end] process. In an exothermic reaction, the energy release from forming bonds is [blank_start]higher[blank_end] than the energy used to break them.
Answer
  • endothermic
  • exothermic
  • higher
  • lower

Question 3

Question
Two solutions are added together. The temperature of the reaction goes down. What type of reaction is this?
Answer
  • exothermic
  • endothermic

Question 4

Question
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 [blank_start]24[blank_end] Celsius.
Answer
  • 24

Question 5

Question
Which line represents the fastest overall reaction?
Answer
  • A
  • B
  • C

Question 6

Question
Select the correct statement about how the rate changes during the reaction.
Answer
  • it increases from zero
  • it increases, then decreases to zero
  • it decreases to zero
  • it stays the same

Question 7

Question
Select all the factors that can change the rate of reaction. (hint: there's more than one)
Answer
  • pressure
  • volume
  • concentration
  • catalysts
  • temperature
  • surface area
  • height
  • size of container

Question 8

Question
Using data from the table, what was the mean rate of reaction? [blank_start]0.5[blank_end] cm3/s
Answer
  • 0.5

Question 9

Question
The activation energy for a reaction was measured with and without a catalyst. Select the value that was the value for the catalysed reaction.
Answer
  • 55 kJ/mol
  • 72 kJ/mol

Question 10

Question
Increasing the [blank_start]surface area[blank_end] of reactants frees up more particles that are available to [blank_start]collide[blank_end] 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 [blank_start]react[blank_end] first to be available. This leads to more [blank_start]frequent[blank_end], successful collisions and so the rate of reaction increases.
Answer
  • collide
  • react
  • frequent
  • surface area
  • concentration
  • temperature

Question 11

Question
Which of the following is not an example of an endothermic reaction?
Answer
  • electrolysis
  • photosynthesis
  • thermal decomposition
  • combustion

Question 12

Question
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 [blank_start]-183[blank_end] kJ/mol
Answer
  • -183