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 the above statements is true.

Question

Quizplus · Accepted Answer

The positive slope of the solid-liquid curve indicates that the solid phase of xenon is denser than the liquid phase. Therefore, option A is correct. Option B is incorrect because the solid phase has a higher density. Option C is incorrect because the phase diagram does provide information about the relative densities of the phases. Option D is unrelated to the given information and is incorrect. Therefore, the correct answer is A.

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