The Phase Diagram for Xenon Has a Solid-Liquid Curve with a Positive

Multiple Choice

The phase diagram for xenon has a solid-liquid curve with a positive slope. Which of the following is true?

A) Solid xenon has a higher density than liquid xenon.
B) Solid xenon has the same density as liquid xenon.
C) The phase diagram cannot be used to predict which phase of xenon is denser.
D) Freezing xenon is an endothermic process.
E) None of these choices are correct.