B.4.8 (HL)—Local entropy decrease Topic Practice
B.4.8 (HL)—Local entropy decrease Topic Practice
Practise deciding when a gas can show a local entropy decrease and explaining why the second law is still obeyed once the surroundings are included.
How this is tested
- interpret a gas change or compression and decide whether the gas entropy decreases without calculation
- explain why a local drop in gas entropy does not violate the second law by considering system plus surroundings