Pearson Edexcel International GCSE in Chemistry · 4CH1 · Free · no account needed
Calorimetry Calculations — exam questions
12 original Incandio exam-style questions on Calorimetry Calculations, 27 marks, about 27 minutes of writing. Each one carries the command word, the tariff and the specification statement it assesses, exactly as a paper presents them. This is an original Incandio practice question, written to reflect the structure and demands of the qualification. It is not an official Pearson Edexcel past-paper question.
This is the practice set for Calorimetry Calculations — the lesson that teaches it. Read the lesson first if the idea is new; come here when you want to find out whether you can turn it into marks. Completely free, no account needed to read.
What these questions ask of you
6 command words run through this set, and on Pearson Edexcel International GCSE Chemistry each one means something precise. Answering the wrong command is the commonest way a candidate who understands the lesson still loses the mark.
- Which (1 mark)
- one option chosen from the set given
- Give (1–2 marks)
- a short factual answer — the most common chemistry command
- State (1 mark)
- one precise fact, no justification
- Calculate (1–4 marks)
- a numerical answer with working, to the stated precision
- Explain (2–4 marks)
- the reason, in terms of particles, bonding, energy or equilibrium Misread as: describing the observation without giving the chemistry that causes it
- Suggest (1–3 marks)
- a plausible answer applying taught chemistry to an unfamiliar substance
Assessed on Paper 1 (4CH1/1C) and Paper 2 (4CH1/2C), against AO1, AO2, AO3.
Where these sit in the specification
Pearson Edexcel International GCSE Chemistry (4CH1) — statements 3.3 · 3.4. Incandio is aligned to this specification; it is not published by, endorsed by or affiliated with Pearson, and it reproduces none of Pearson's wording.
The 12 questions
Answer them on paper, then open the lesson's exam practice to have them marked. The mark scheme, the accepted and rejected answers and the annotated model answer are in Incandio and are not printed here — an answer beside its question is not practice.
-
A student burned a spirit burner of methanol, CH₃OH, under a copper can holding 100 cm³ of water. The water temperature rose from 19.0 °C to 41.0 °C, and the burner lost 0.32 g of methanol.
Data — Q = mcΔT, with c = 4.2 J/g/°C for water. The density of water is 1.00 g/cm³. Relative atomic masses: H = 1, C = 12, O = 16.
(a)
(2)Calculate
Calculate the energy gained by the water, in joules.
A student burned a spirit burner of methanol, CH₃OH, under a copper can holding 100 cm³ of water. The water temperature rose from 19.0 °C to 41.0 °C, and the burner lost 0.32 g of methanol.
Data — Q = mcΔT, with c = 4.2 J/g/°C for water. The density of water is 1.00 g/cm³. Relative atomic masses: H = 1, C = 12, O = 16.
energy gained by the water = ............................ J
(b)
(2)Calculate
Calculate the number of moles of methanol burned.
A student burned a spirit burner of methanol, CH₃OH, under a copper can holding 100 cm³ of water. The water temperature rose from 19.0 °C to 41.0 °C, and the burner lost 0.32 g of methanol.
Data — Q = mcΔT, with c = 4.2 J/g/°C for water. The density of water is 1.00 g/cm³. Relative atomic masses: H = 1, C = 12, O = 16.
(c)
(3)Calculate
Calculate the molar enthalpy change of combustion of methanol from these results, in kJ/mol.
A student burned a spirit burner of methanol, CH₃OH, under a copper can holding 100 cm³ of water. The water temperature rose from 19.0 °C to 41.0 °C, and the burner lost 0.32 g of methanol.
Data — Q = mcΔT, with c = 4.2 J/g/°C for water. The density of water is 1.00 g/cm³. Relative atomic masses: H = 1, C = 12, O = 16.
............................ kJ/mol
(d)
(3)Suggest
The accepted value is −726 kJ/mol. Suggest why the student's result is further from it than heat loss alone would explain.
A student burned a spirit burner of methanol, CH₃OH, under a copper can holding 100 cm³ of water. The water temperature rose from 19.0 °C to 41.0 °C, and the burner lost 0.32 g of methanol.
Data — Q = mcΔT, with c = 4.2 J/g/°C for water. The density of water is 1.00 g/cm³. Relative atomic masses: H = 1, C = 12, O = 16.
(Total for Question 1 = 10 marks)
-
(1)Which
Which quantity does the m stand for in Q = mcΔT?
Quantity A the mass of fuel burned B the mass of water heated C the number of moles of fuel D the mass of the container (Total for Question 2 = 1 mark)
-
(1)Give
Give the unit of the energy change Q calculated from Q = mcΔT.
(Total for Question 3 = 1 mark)
-
(1)State
State the sign of ΔH for an exothermic reaction.
(Total for Question 4 = 1 mark)
-
(2)Calculate
Calculate the energy transferred when 50.0 g of water rises in temperature by 12.0 °C.
Data — Q = mcΔT, with c = 4.2 J/g/°C for water. The density of water is 1.00 g/cm³. Relative atomic masses: H = 1, C = 12, O = 16.
energy transferred = ............................ J
(Total for Question 5 = 2 marks)
-
(3)Calculate
A reaction released 6300 J and used 0.0500 moles of the limiting reactant. Calculate the molar enthalpy change in kJ/mol.
molar enthalpy change = ............................ kJ/mol
(Total for Question 6 = 3 marks)
-
(2)Explain
Explain why the mass of water rather than the mass of fuel is used in Q = mcΔT.
(Total for Question 7 = 2 marks)
-
(3)Suggest
Suggest why a value for the energy released by a fuel measured in a school laboratory is always lower than the accepted value.
(Total for Question 8 = 3 marks)
-
(4)Calculate
A spirit burner containing ethanol loses 0.85 g in mass while heating 150 g of water in a copper can. The temperature of the water rises by 38.5 °C. Calculate the energy transferred to the water for each gram of ethanol burned.
Given — Q = mcΔT, and the specific heat capacity of water is 4.2 J/g/°C.
energy per gram = ............................ J/g
(Total for Question 9 = 4 marks)
Have them marked, then defend the answer
Practice tells you the mark; teaching it back tells you whether you understand it. On Incandio a topic counts as mastered only once you have taught it and defended it.
- Mark these questions — 12 questions, marked on Incandio against the authored scheme, with the mistake you actually made named.
- Teach it — explain Calorimetry Calculations to Ember, an AI pupil who does not have it yet and asks the awkward question.
- Defend it — argue it against James Prescott Joule over three rounds, marked against descriptors you can read first.
Completely free. No subscriptions, no paywalls, no account needed to start.
Back to the lesson
- Calorimetry Calculations — Turning a temperature rise into an energy in joules, and then into a value per mole.
- All of Incandio Chemistry · Incandio Exam Practice