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CAIE A-Level Chemistry 23.3.1 Entropy

Practise defining entropy as the number of possible arrangements of particles and their energy in a system.

Syllabus
2028–2030
Course
Chemistry 9701
Level
A2

Exam points

  • state that entropy counts possible arrangements of both particles and energy within a system
  • distinguish this statistical definition from the vague description ‘amount of disorder’
  • use S for entropy and ΔS for the change between specified initial and final states

23.3.1—Terms: entropy, S, as the number of possible question 1

[Maximum number: 1]

Potassium chloride, KCl , and magnesium chloride, MgCl2\mathrm{MgCl}_{2}, are both ionic solids.

Table 1.1

Table 1.1

Explain what is meant by entropy, S.

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