Question

On a two component solid-liquid phase diagram, a tie line indicates which of the following?

• A. an area below which only the solid phase exists
• B. a region where the temperature is constant
• C. an area above which only the liquid phase exists
• D. a region where the composition is constant

Answer 1

The correct option is B a region where the temperature is constant

A tie line is another name for an isotherm on a solid-liquid phase diagram. It therefore represents a region of constant temperature.