Chemistry

Question Analysis
This question involves identifying the unique phase diagram feature of water and its link to density. The main focus is on the exception to the general solid-liquid boundary slope rule.

Key Concept Explanation
Unlike most substances, liquid water is denser than solid ice (due to hydrogen bonding creating an open lattice in ice). This results in a negative solid-liquid boundary slope, meaning increasing pressure favors the denser liquid phase (melting ice at lower temperatures).

Step-by-Step Solution
1. Recall the unique slope of water’s solid-liquid boundary line.
2. ...