Solid : Solid is a sample of matter that retains its shape and density when not confined. Stronger forces of attraction exist between atom/ions/ molecules. Liquid: A liquid is a sample of matter that conforms to shape of container in which acquires a defined surface in the presence of gravity. In this state weaker force exist between atoms/ ions/ molecules. Gas: A gas is a sample of matter that conforms to the shape of container in which it is placed and acquires whole volume of container. Negligible forces of attraction exist between atoms/ions/molecules. Supercritical fluid: Fluid over its critical temperature and pressure exhibiting good solvent power. Boling point: The boiling point of a substance is the temperature at which the vapour pressure of the liquid equal the pressure surrounding the liquid and liquid change in vapour Normal point: The normal boiling point of a substance is defined as the temperature at which the vapour pressure of the liquid becomes equal to 1 a t m at the sea level. Concept introduction: This is the generic phase diagram. This graph show phase change as a function of temperature and pressure. To determine: Argon has a normal boiling point at 87.2 K and a melting point ( at 1atm ) of 84.1 K its critical temperature is 150.8 K and critical pressure is 43.3 atm. It has triple point at 83.7 K and 0.68 a t m . Sketch the phase diagram and find out which has greater density solid argon or liquid argon.

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Chapter 13, Problem 22E

Interpretation Introduction

Interpretation:

Solid: Solid is a sample of matter that retains its shape and density when not confined. Stronger forces of attraction exist between atom/ions/ molecules.

Liquid: A liquid is a sample of matter that conforms to shape of container in which acquires a defined surface in the presence of gravity. In this state weaker force exist between atoms/ ions/ molecules.

Gas: A gas is a sample of matter that conforms to the shape of container in which it is placed and acquires whole volume of container.

Negligible forces of attraction exist between atoms/ions/molecules.

Supercritical fluid: Fluid over its critical temperature and pressure exhibiting good solvent power.

Boling point: The boiling point of a substance is the temperature at which the vapour pressure of the liquid equal the pressure surrounding the liquid and liquid change in vapour

Normal point: The normal boiling point of a substance is defined as the temperature at which the vapour pressure of the liquid becomes equal to $1 a t m$ at the sea level.

Concept introduction:

This is the generic phase diagram. This graph show phase change as a function of temperature and pressure.

To determine:

Argon has a normal boiling point at $87.2 K$ and a melting point $(at 1atm)$ of $84.1 K$ its critical temperature is $150.8 K$ and critical pressure is $43.3$ atm. It has triple point at $83.7 K$ and $0.68 a t m$ . Sketch the phase diagram and find out which has greater density solid argon or liquid argon.

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