Chapter 8, Problem 8.6NP

(a)

Interpretation Introduction

Interpretation:The denserphase; FCC or BCC on the basis of given P-T curve for potassium needs to be determined.

  

Concept Introduction:All substances can mainly exist in three phases; solid, liquid and gas. These three phases can convert into each other by the application of temperature and pressure such as heating of solid leads to the conversion to liquid and then gaseous state of matter.

Similarly, the gases can be compressed at high pressure to liquefy. The interconversion of three phases of substance can be shown on the phase diagram.

(b)

Interpretation Introduction

Interpretation:The new diagram for different pressure range that indicates the vapor pressure needs to be determined.

Concept Introduction:All substances can mainly exist in three phases; solid, liquid and gas. These three phases can convert into each other by the application of temperature and pressure such as heating of solid leads to the conversion to liquid and then gaseous state of matter.

Similarly, the gases can be compressed at high pressure to liquefy. The interconversion of three phases of a substance can be shownin the phase diagram.

(c)

Interpretation Introduction

Interpretation:The possibility of floating or sinking of FCC phase in liquid potassium needs to be explained, if the FCC and liquid potassium are in the equilibrium.

Concept Introduction:All substances can mainly exist in three phases; solid, liquid and gas. These three phases can convert into each other by the application of temperature and pressure such as heating of solid leads to the conversion to liquid and then gaseous state of matter.

Similarly, the gases can be compressed at high pressure to liquefy. The interconversion of three phases of substance can be shown on the phase diagram.