How would a heating or cooling curve for a mixture look different than a pure substance?

A heating or cooling curve for a mixture would exhibit more gradual phase transitions compared to a pure substance. This is due to the presence of multiple components with varying boiling and melting points, which leads to a broader temperature range over which phase changes occur. Instead of distinct plateaus characteristic of pure substances, the curve for a mixture may show overlapping transitions, reflecting the complex interactions and thermal behavior of its components. Consequently, the overall shape of the curve would be less sharp and more extended.