In the phase diagram, the regions have to be labeled. Concept Introduction: Phase diagrams are the one where the pressure is plotted against temperature of the substance. Stability of the physical state for the substance can be obtained. The equilibrium between two phases if it exists can be inferred. Triple point for the substance is shown and also the melting, boiling point.

Question

Phase changes occur between different solid forms, as well as from solid to liquid, liquid to gas, and solid to gas. When white tin at 1.00 atm is cooled below 13.2°C, it spontaneously changes (over a period of weeks) to gray tin. The density of gray tin is less than the density of white tin ( 5.75 g cm^-3 vs 7.31 g cm^-3 ). Some white tin is compressed to a pressure of 2.00 atm. At this pressure, should the temperature be higher or lower than 13.2°C for the conversion to gray tin to occur? Explain your reasoning.

Answer 1

Question

Chapter 11, Problem 11.44QE

(a)

Interpretation Introduction

Interpretation:

In the phase diagram, the regions have to be labeled.

Concept Introduction:

Phase diagrams are the one where the pressure is plotted against temperature of the substance.

Stability of the physical state for the substance can be obtained.

The equilibrium between two phases if it exists can be inferred.

Triple point for the substance is shown and also the melting, boiling point.

(b)

Interpretation Introduction

Interpretation:

The phase or phases that is present in the points labeled as G, H, J, and K has to be identified.

Concept Introduction:

Refer part (a).

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Phase changes occur between different solid forms, as well as from solid to liquid, liquid to gas, and solid to gas. When white tin at 1.00 atm is cooled below 13.2°C, it spontaneously changes (over a period of weeks) to gray tin. The density of gray tin is less than the density of white tin ( 5.75 g cm^-3 vs 7.31 g cm^-3 ). Some white tin is compressed to a pressure of 2.00 atm. At this pressure, should the temperature be higher or lower than 13.2°C for the conversion to gray tin to occur? Explain your reasoning.

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