The solid-liquid line in this diagram has a negative slope.
Which substance is consistent with this diagram?
- Acheck_circle
Water (solid less dense than liquid)
- B
Methane
- C
CO2 (typical case)
- D
Argon
Explanation
Most substances have positive solid-liquid slopes; water's slope is negative because ice is less dense than liquid water (so increasing P at fixed T melts ice).