   Chapter 12, Problem 41GQ

Chapter
Section
Textbook Problem

Sketch a phase diagram for O2 from the following information: normal boiling point, 90.18 K; normal melting point, 54.8 K; and triple point, 54.34 K at a pressure of 2 mm Hg. Very roughly estimate the vapor pressure of liquid O2 at −196 °C, the lowest temperature easily reached in the laboratory. Is the density of liquid O2 greater or less than that of solid O2?

Interpretation Introduction

Interpretation:

Phase diagram of oxygen has to be drawn and the density of liquid oxygen is greater or less than the solid oxygen has to be identified.

Concept introduction:

• Under certain specific conditions, two states can coexist in equilibrium; can be represented in phase diagram.
• The triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium.
Explanation
• Phase diagram of oxygen is shown here, according to the given values.

• According to the dia...

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