Chapter 12, Problem 12.113QP

(a)

Interpretation Introduction

Interpretation:

The following phenomenon has to be explained –

Solid argon of melting point $\text{-189}\text{.2°C and boiling point -185}\text{.7°C}$ can be prepared by immersing a flask containing argon gas in liquid nitrogen $\left(\text{b}\text{.p}\text{. -195}\text{.8°C}\right)$ until it liquefies and then connecting the flask to a vacuum pump.

(b)

Interpretation Introduction

Interpretation:

The following phenomenon has to be explained –

The melting point of cyclohexane ${\text{(C}}_{\text{6}}{\text{H}}_{\text{12}})$ increases with increasing pressure exerted on the solid cyclohexane.

(c)

Interpretation Introduction

Interpretation:

The following phenomenon has to be explained –

Certain high-altitude clouds contain water droplets at $\text{-10°C}$.

(d)

Interpretation Introduction

Interpretation:

The following phenomenon has to be explained –

When a piece of dry ice is added to a beaker of water, fog forms above the water.