| Date | November 2013 | Marks available | 1 | Reference code | 13N.1.HL.TZ0.9 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 0 |
| Command term | Question number | 9 | Adapted from | N/A |
Question
A piece of ice melts at constant temperature. Which of the following gives the correct change in the entropy of the water molecules and that of the surroundings?
Markscheme
A
Examiners report
A large number of candidates opted for C. This stems from the misconception that the entropy of the surroundings must always increase, but there are situations where there may be a decrease in the entropy of the surroundings.
Syllabus sections
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