Chapter 4, Problem 77A

Interpretation Introduction

Interpretation : The atomic level when this change occurs is to be inferred. The synthesis accomplishment is to be suggested.

Concept Introduction : The measure of how densely a material is packed together is called density. It is described as the mass per unit volume.

Answer to Problem 77A

At the atomic level, there is a change in the packing of atoms. The diamond is packed compactly so its density of it is higher than graphite. The synthesis may have been accomplished by the use of high pressure.

Explanation of Solution

The connectivity between mass and volume is density. The formula of mass when density and volume are given:

  $\text{Mass}\text{=}\text{Density}\times \text{Volume}$

The term allotropy is defined as an element existing in different physical forms but having the same chemical property.

Allotrope is the different form of an element.

Diamond and graphite are the allotropes of carbon.

The density of diamonds is $3.52{\text{g/cm}}^3$ .

The density of graphite is $2.25{\text{g/cm}}^3$ .

For the making of diamond, graphite is held together that is the atoms of carbon come together. Here, the density increases.

The synthesis of the diamond from graphite is done using high pressure.