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Date November 2014 Marks available 1 Reference code 14N.1.hl.TZ0.16
Level HL Paper 1 Time zone TZ0
Command term Question number 16 Adapted from N/A

Question

Which processes have a negative value for \(\Delta {S^\Theta }\)?

I.     \({{\text{H}}_{\text{2}}}{\text{O(l)}} \to {{\text{H}}_{\text{2}}}{\text{O(s)}}\)

II.     \({\text{2}}{{\text{H}}_{\text{2}}}{{\text{O}}_{\text{2}}}{\text{(l)}} \to {\text{2}}{{\text{H}}_{\text{2}}}{\text{O(l)}} + {{\text{O}}_{\text{2}}}{\text{(g)}}\)

III.     \({\text{2}}{{\text{H}}_{\text{2}}}{\text{(g)}} + {{\text{O}}_{\text{2}}}{\text{(g)}} \to {\text{2}}{{\text{H}}_{\text{2}}}{\text{O(g)}}\)

A.     I and II only

B.     I and III only

C.     II and III only

D.     I, II and III

Markscheme

B

Examiners report

[N/A]

Syllabus sections

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