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Edexcel GCE In Chemistry (8CH0) Paper 02: Core Organic and Physical Chemistry may 2023
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Edexcel GCE In Chemistry (8CH0) Paper 02: Core Organic and Physical Chemistry may 2023
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[Date] Pearson EdexcelGCE In
Chemistry
(8CH0) Paper 02
: Core Organic and Physical
Chemistry
[Author name]
[COMPANY NAME]
,Instructions
• Use
• IfFillpencil
black ink or ball‑point pen.
is used for diagrams/sketches/graphs it must be dark (HB or B).
• in the boxes at the top of this page with your name,
centre number and candidate number.
• Answer all
• Answer
provided
the questions in the spaces
questions.– there may be more space than
you need.
Information
• The
• The
total mark for this paper is 80.
marks for each question are shown in brackets
• For the question marked with an asterisk (*), marks will be awarded for your
– use this as a guide as to how much time to spend on each question.
ability to structure your answer logically, showing the points that you make
• are related or follow on from each other where appropriate.
A Periodic Table is printed on the back cover of this paper.
Advice
• Read
•
each question carefully before you start to answer it.
Show all your working in calculations and include units where appropriate.
, • Check your answers if you have time at the end.
Answer ALL questions.
Some questions must be answered with a cross in a box . If you
change your mind about an answer, put a line through the box and
then mark your new answer with a cross .
1 This question is about collision theory.
The Maxwell‑Boltzmann distribution of molecular energies for a reaction at a
particular temperature is shown in the graph.
Add another line on the graph to represent the same reaction with the same
number of particles at a higher temperature.
Number of
particles with
energy, E
Energy, E
(Total for Question 1 = 2 marks)
2
, 2 This question is about alkanes and some of their reactions.
(a) Hexane is a saturated hydrocarbon.
State what is meant by the term ‘saturated hydrocarbon’.
Your answer should refer to both words in the term.
(2)
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(b) When methane reacts with gaseous chlorine, the initiation step is bond
breaking in the chlorine molecule to form chlorine free radicals.
The equation for this step is shown.
Cl2(g) → 2Cl•(g)
Two equations for the propagation step are shown.
Cl•(g) + CH4(g) → CH3•(g) + HCl(g)
CH3•(g) + Cl2(g) → CH3Cl(g) +
Cl•(g)
(i) Write the overall equation for this reaction of methane with
chlorine. State symbols are not required.
(1)
(ii) Calculate the maximum mass, in grams, of chloromethane produced
when
7.00 g of chlorine gas reacts completely with excess
methane. [Molar mass of CH3Cl = 50.5 g mol–1] (2)
3
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