When the phase diagram for a substance has a solid-liquid phase boundary line that has a negative slope (leans to the left), the substance ________.
A)can go from solid to liquid, within a small temperature range, via the application of pressure
B)sublimes rather than melts under ordinary conditions
C)cannot go from solid to liquid by application of pressure at any temperature
D)cannot be liquefied above its triple point
E)melts rather than sublimes under ordinary conditions

Question

Quizplus · Accepted Answer

When the solid-liquid phase boundary line has a negative slope, it indicates that increasing pressure can cause the solid to melt into a liquid, which is characteristic of substances like water.

When the Phase Diagram for a Substance Has a Solid-Liquid