l
Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Candidate
Number Number
Pearson Edexcel Level 3
GCE
Tuesday 23 May 2023
8CH0/02
Paper
Morning (Time: 1 hour 30
reference
minutes)
Chemistr
Advanced Subsidiary
y
PAPER 2: Core Organic and Physical
Chemistry
You must have: Total
Scientific calculator, Data Booklet, ruler Marks
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
• – usemarks
total mark for this paper is 80.
The for each question are shown in brackets
• For the question marked with an asterisk (*), marks will be awarded for your
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
Turn over
end.
final
, 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.
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
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
Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Candidate
Number Number
Pearson Edexcel Level 3
GCE
Tuesday 23 May 2023
8CH0/02
Paper
Morning (Time: 1 hour 30
reference
minutes)
Chemistr
Advanced Subsidiary
y
PAPER 2: Core Organic and Physical
Chemistry
You must have: Total
Scientific calculator, Data Booklet, ruler Marks
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
• – usemarks
total mark for this paper is 80.
The for each question are shown in brackets
• For the question marked with an asterisk (*), marks will be awarded for your
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
Turn over
end.
final
, 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.
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
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
