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Chapter 2: Q12.135P (page 40)

The density of solid gallium at its melting point is 5.9g/cm3, whereas that of liquid gallium is 6.1g/cm3. Is the temperature at the triple point higher or lower than the normal melting point? Is the slope of the solid-liquid line for gallium positive or negative?

Short Answer

Expert verified

The density of the liquid having 6.1gcm-3 is higher than that of the solid having density 5.9g/cm3because as the pressure increases, the solid gets converted into a liquid state.

Step by step solution

01

Definition

The density of the molecule can be defined as the ratio of the mass of the molecule to the volume occupied by themolecule.

Density=MassVolume

The phase diagram is the diagram showing the change in the phase of the molecule do the change in the temperature and pressure shown in the two-dimensional temperature at one axis and pressure at other axes.

02

Numerical Explanation

The density of solid Gallium =5.9g/cm3

The density of the liquid Gallium 6.1g/cm3

The density of liquid gallium is greater than the density of solid gallium, as explained in the below phase diagram.

According to the phase diagram, there is a negative slope of solid liquid, and as one increases the pressure, the solid gallium is converted into liquid gallium.

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