Edexcel IAL Chemistry 12.2 Entropy and dispersal

Count distinct ways energy can be distributed, then use greater molecular complexity or more accessible arrangements to justify the higher molar entropy.

Exam points

Complete energy-quanta distributions by listing every distinct allocation between molecules.
Compare standard molar entropies using molecular complexity and possible energy arrangements.

[Maximum number: 1]

Which of these gases would have the greatest standard molar entropy?

$\mathrm{NH}_{3}$

$\mathrm{H}_{2}$

$\mathrm{N}_{2}$

$\mathrm{SO}_{2}$

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12.2—Entropy as a measure of disorder of a system in terms of the random dispersal of molecules and of energy quanta between question 1