O-LevelChemistryRates of Reaction5070/11 · Oct/Nov 2015 · Q141 Mark

The enthalpy changes when methane, butane and octane are burned completely in oxygen are shown below. Which are the enthalpy changes when propane and pentane are burned completely in oxygen?

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A-2220 (kJ/mol), -4210 (kJ/mol)

B-2220 (kJ/mol), -3530 (kJ/mol)

C-1560 (kJ/mol), -4210 (kJ/mol)

D-1560 (kJ/mol), -3530 (kJ/mol)

✓ Correct answer

B: -2220 (kJ/mol), -3530 (kJ/mol)

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Topic: Rates of Reaction, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2015 Paper 1 Variant 1, question 14.

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