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Date November 2009 Marks available 1 Reference code 09N.1.hl.TZ0.18
Level HL Paper 1 Time zone TZ0
Command term Identify Question number 18 Adapted from N/A

Question

Which change leads to an increase in entropy?

A.     \({\text{C}}{{\text{O}}_{\text{2}}}{\text{(g)}} \to {\text{C}}{{\text{O}}_{\text{2}}}{\text{(s)}}\)

B.     \({\text{S}}{{\text{F}}_6}({\text{g)}} \to {\text{S}}{{\text{F}}_6}({\text{l)}}\)

C.     \({{\text{H}}_2}{\text{O(l)}} \to {{\text{H}}_2}{\text{O(s)}}\)

D.     \({\text{NaCl(s)}} \to {\text{NaCl(aq)}}\)

Markscheme

D

Examiners report

[N/A]

Syllabus sections

Additional higher level (AHL) » Topic 15: Energetics/thermochemistry » 15.2 Entropy and spontaneity
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