Chapter 13, Problem 66E

Interpretation Introduction

Interpretation:

You have to find out which is at lower temperature triple point or normal melting point. If d $\left(\text{solid}\right)>\text{d}\left(\text{liquid}\right),$ and triple point is below $1atm.$

Concept introduction:

If the solid phase is less dense than the liquid phase, then the line separates solid and liquids $\left(\text{fusion curve}\right)$ bends left. $\left(\text{Like water}\right)$

Melting curve is inclined to the solid phase is denser than the liquid phase. The line that separates solid and liquid bends right.