| Date | November 2012 | Marks available | 1 | Reference code | 12N.1.HL.TZ0.11 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 0 |
| Command term | Question number | 11 | Adapted from | N/A |
Question
An ideal gas expands adiabatically. What energy change is true for the gas?
A. It gains thermal energy from the surroundings
B. It loses thermal energy to the surroundings
C. Its internal energy increases
D. Its internal energy decreases
Markscheme
D
Examiners report
There were two aspect to this – adiabatic means no thermal energy transfer (ruling out A and B); expansion means work done on the surroundings and loss of internal energy to do the work. D is the only response matching this.
Syllabus sections
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