Practice question · Select all that apply
Which changes generally increase the entropy of a chemical system?
Hints
- Three increase molecular freedom; one imposes order.
- Crystallisation locks ions into a fixed lattice.
Show the answer
- A. Raising the temperature of a liquid
- C. A reaction producing more moles of gas than it consumes
- D. Converting a solid directly to a gas
Why
Sublimation, heating and net gas production all widen the range of accessible arrangements. Crystallisation does the opposite, pinning mobile ions into a regular lattice, so it lowers the system’s entropy.
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