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information
Candidate surname Other names
Centre Candidate
Number Number
Pearson Edexcel Level 3
GCE
Tuesday 23 May 2023
Paper
Morning (Time: 1 hour 30
minutes)
referenc
e
8CH0/02
Chemistry
Advanced Subsidiary
PAPER 2: Core Organic and Physical
Chemistry
You must have: Total
Scientific calculator, Data Booklet, ruler Marks
Instructions
• Use black ink or ball‑point pen.
• IfFillpencil is used for diagrams/sketches/graphs it must be dark (HB or B).
• centre number
in the boxes at the top of this page with your name,
and candidate number.
•• Answer all
Answer the questions in the spaces
provided – there may be more space than
you need.
questions.
Information
• The total mark for this paper is 80.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• For the question marked with an asterisk (*), marks will be awarded for your
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 Turn over
end.
1
, 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)
(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.
(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
Turn
over
, (iii) Write an equation for a termination step for this
reaction. State symbols are not required.
(1)
(iv) Further substitution of chloromethane can occur, producing
dichloromethane, which is a liquid at room temperature.
Calculate the maximum volume, in cm3, of dichloromethane liquid that
could be produced from 12.5 g of chloromethane.
Give your answer to an appropriate number of significant figures.
(3)
CH3Cl(g) + Cl2(g) → CH2Cl2(l) + HCl(g)
[Density of dichloromethane, CH2Cl2(l) = 1.32 g cm–3]
4
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