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Date November 2013 Marks available 1 Reference code 13N.1.hl.TZ0.18
Level HL Paper 1 Time zone TZ0
Command term Determine Question number 18 Adapted from N/A

Question

Which processes are predicted to have a positive entropy change, ΔS?

I.     I2(g)I2(s)

II.     4NH3(g)+5O2(g)4NO(g)+6H2O(g)

III.     CH3OH(l)CH3OH(g)

A.     I and II only

B.     I and III only

C.     II and III only

D.     I, II and III

Markscheme

C

Examiners report

[N/A]

Syllabus sections

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