PAG 3.3 – Determination of enthalpy changes of combustion

Last updated: 11/03/2020

OCR-A A-Level Chemistry Physical chemistry PAG 3.3 – Determination of enthalpy changes of combustion

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Question 1 of 28

1. Question
What type of measuring cylinder should be used?
- 100 cm $^3$
- 150 cm $^3$
- 50 cm $^3$
- 25 cm $^3$
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Question 2 of 28

2. Question
What type of beaker should be used?
- 250 cm $^3$
- 50 cm $^3$
- 100 cm $^3$
- 150 cm $^3$
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Question 3 of 28

3. Question
How much water should be measured out?
- 150 cm $^3$
- 50 cm $^3$
- 100 cm $^3$
- 250 cm $^3$
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Question 4 of 28

4. Question
What type of reaction is the combustion of an alcohol?
- Exothermic
- Endothermic
- Neutralisation
- Reduction
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Question 5 of 28

5. Question
Which of the following is needed to calculate the enthalpy change of combustion?
- Calorimeter
- Test tube
- Bunsen burner
- Fume cupboard
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Question 6 of 28

6. Question
What enthalpy change is being calculated?
- Combustion
- Standard
- Formation
- Neutralisation
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Question 7 of 28

7. Question
Which of the following will need to be recorded?
- Mass of alcohol
- Volume of sodium hydroxide
- Concentration of alcohol
- Temperature change of alcohol
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Question 8 of 28

8. Question
Which of the following will need to be recorded?
- Specific heat capacity
- Temperature
- Concentration of water
- Mass of water
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Question 9 of 28

9. Question
Which of the following will need to be recorded?
- Temperature change of water
- Concentration of water
- Concentration of alcohol
- Volume of alcohol
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Question 10 of 28

10. Question
To how many decimal places should the balance used be to?
- 2
- 1
- 3
- 4
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Question 11 of 28

11. Question
What is one hazard when using an alcohol within an experiment?
- It is highly flammable
- It is carcinogenic
- It is highly toxic
- It can cause skin and eye irritation
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Question 12 of 28

12. Question
What type of calorimeter should be used?
- Copper
- Zinc
- Aluminium
- Tin
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Question 13 of 28

13. Question
What is one hazard when using methanol within an experiment?
- It is highly toxic
- It is carcinogenic
- It can cause skin and eye irritation
- It is harmful if swallowed
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Question 14 of 28

14. Question
What is one hazard when using methanol within an experiment?
- It is highly flammable
- It is carcinogenic
- It can cause skin and eye irritation
- It is harmful if swallowed
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Question 15 of 28

15. Question
What is one hazard when using ethanol within an experiment?
- It is harmful if swallowed
- It is carcinogenic
- It is highly toxic
- It can cause skin and eye irritation
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Question 16 of 28

16. Question
What is one hazard when using propanol within an experiment?
- It can cause skin and eye irritation
- It is harmful if swallowed
- It is carcinogenic
- It is highly toxic
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Question 17 of 28

17. Question
What is one hazard when using butan-1-ol within an experiment?
- It is harmful if swallowed
- It is carcinogenic
- It is highly toxic
- It is highly flammable
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Question 18 of 28

18. Question
What is one hazard when using butan-1-ol within an experiment?
- It can cause skin and eye irritation
- It is carcinogenic
- It is highly toxic
- It is highly flammable
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Question 19 of 28

19. Question
How many different types of alcohols will be used?
- 5
- 4
- 3
- 1
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Question 20 of 28

20. Question
For safety when determining the enthalpy change of combustion, which of the following should be done?
- Wear goggles
- Take place in a fume cupboard
- Wear a lab coat
- Ensure the room is properly vented
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Question 21 of 28

21. Question
Where should the water be placed?
- Calorimeter/beaker
- Flask
- Test tube
- Conical flask
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Question 22 of 28

22. Question
What piece of information about the alcohol should be calculated?
- Energy given out
- Volume
- Energy used
- Concentration
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Question 23 of 28

23. Question
What piece of information about the alcohol should be calculated?
- Moles
- Volume
- Energy used
- Concentration
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Question 24 of 28

24. Question
Write an equation for the enthalpy change of combustion of methanol.
- $CH_3OH(l) + 1.5O_2(g) -> CO_2(g) + 2H_2O(l)$
- $CH_3OH(l) + 1.5O_2(g) -> CO_2(g) + H_2O(l)$
- $CH_3OH(l) + 1.5O_2(g) -> 3CO_2(g) + 2H_2O(l)$
- $CH_3OH(l) + O_2(g) -> CO_2(g) + 2H_2O(l)$
Correct

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Question 25 of 28

25. Question
Write an equation for the enthalpy change of combustion of ethanol.
- $CH_3CH_2OH(l) + 3O_2(g) -> 2CO_2(g) + 3H_2O(l)$
- $CH_3CH_2OH(l) + 3O_2(g) -> 2CO_2(g) + H_2O(l)$
- $CH_3CH_2OH(l) + 3.5O_2(g) -> 2CO_2(g) + 3H_2O(l)$
- $CH_3CH_2OH(l) + 3O_2(g) -> CO_2(g) + 3H_2O(l)$
Correct

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Question 26 of 28

26. Question
Write an equation for the enthalpy change of combustion of propanol.
- $CH_3CH_2CH_2OH(l) + 4.5O_2(g) -> 3CO_2(g) + 4H_2O(l)$
- $CH_3CH_2CH_2OH(l) + 4.5O_2(g) -> 4CO_2(g) + 3H_2O(l)$
- $CH_3CH_2CH_2OH(l) + 4O_2(g) -> 3CO_2(g) + 4H_2O(l)$
- $CH_3CH_2CH_2OH(l) + 4O_2(g) -> 4CO_2(g) + 3H_2O(l)$
Correct

Incorrect
Question 27 of 28

27. Question
Write an equation for the enthalpy change of combustion of butan-1-ol.
- $CH_3CH_2CH_2CH_2OH(l) + 6O_2(g) -> 4CO_2(g) + 5H_2O(l)$
- $CH_3CH_2CH_2CH_2OH(l) + 6O_2(g) -> 5CO_2(g) + 4H_2O(l)$
- $CH_3CH_2CH_2CH_2OH(l) + 5.5O_2(g) -> 3CO_2(g) + 5H_2O(l)$
- $CH_3CH_2CH_2CH_2OH(l) + 5.5O_2(g) -> 4CO_2(g) + 5H_2O(l)$
Correct

Incorrect
Question 28 of 28

28. Question
Write an equation for the enthalpy change of combustion of pentan-1-ol.
- $CH3CH2CH2CH2CH2OH(l) + 7.5O2(g) -> 5CO2(g) + 6H2O(l)$
- $CH3CH2CH2CH2CH2OH(l) + 7.5O2(g) -> 6CO2(g) + 5H2O(l)$
- $CH3CH2CH2CH2CH2OH(l) + 7O2(g) -> 6CO2(g) + 5H2O(l)$
- $CH3CH2CH2CH2CH2OH(l) + 7O2(g) -> 5CO2(g) + 6H2O(l)$
Correct

Incorrect