The enthalpy of vaporisation of a substance is 8400 J mol⁻¹ and its boiling point is −173°C. The entropy change for vaporisation is:
- A84 J mol⁻¹ K⁻¹
- B21 J mol⁻¹ K⁻¹
- C49 J mol⁻¹ K⁻¹
- D12 J mol⁻¹ K⁻¹
✓ Correct answer: A
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