DP Chemistry (last assessment 2024)

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Question 22N.1.hl.TZ0.17

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Date November 2022 Marks available [Maximum mark: 1] Reference code 22N.1.hl.TZ0.17
Level hl Paper 1 Time zone TZ0
Command term State Question number 17 Adapted from N/A
17.
[Maximum mark: 1]
22N.1.hl.TZ0.17

At which temperature could ΔH, ΔS, and ΔG all be positive?

A.  High temperatures

B.  Low temperatures

C.  Any temperature

D.  No temperature

[1]

Markscheme

B

Examiners report

Nearly 70% of the candidates managed to deduce that ΔH, ΔS, and ΔG can only all be positive at low temperatures, when the contribution of entropy to free energy is minimal. The distractors were all about equally favoured.

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