Question 1

The energy of formation of one mole of solid crystalline ionic compound when ions in the gas phase combine is referred to as _____.

Accepted Answer

The energy of formation of one mole of solid crystalline ionic compound when ions in the gas phase combine is referred to as lattice energy. It is the energy required to separate one mole of a solid ionic compound into its gaseous ions.

Question 2

Given the accompanying phase diagram, under what conditions will liquid be found in equilibrium with either solid or gas?

Accepted Answer

The answer of Given the accompanying phase diagram, under what...

Question 3

Which of the following statements is true about semiconductors?

Accepted Answer

Pure silicon and germanium are called intrinsic semiconductors because they have a naturally occurring small number of impurities, and their electrical conductivity is based solely on the movement of electrons and holes. Extrinsic semiconductors, on the other hand, have impurities intentionally added to control their conductivity. The number of electrons in the conduction band in extrinsic semiconductors is not determined solely by temperature and band gap magnitude but also by the number and type of impurities added. Dopants are not present in intrinsic semiconductors, and the conductivity of intrinsic semiconductors cannot be controlled by adding small numbers of different atoms. Finally, the types of extrinsic semiconductors include p-type and n-type, not intrinsic semiconductors.

Question 4

A sketch of a phase diagram is given below.  Which statement about this diagram is not true?

Accepted Answer

The answer of A sketch of a phase diagram is...

Question 5

Above a substance's _____ temperature, it is not possible to compress the substance into the liquid phase. If enough pressure is applied the substance will become a supercritical fluid.

Accepted Answer

The answer of Above a substance's _____ temperature, it is...

Question 6

A salt with a 1:1 ratio of anions to cations may pack in a face-centered cubic unit cell with the anions at the lattice points and the cations occupying one-half of the _____ holes. Zinc sulfide is an example of this structure.

Accepted Answer

The answer of A salt with a 1:1 ratio of...

Question 7

Sodium chloride crystallizes in a(n) _____ cubic unit cell with chloride ions occupying the lattice points. The sodium ions occupy interstitial regions, with each cation in contact with six chloride ions.

Accepted Answer

The answer of Sodium chloride crystallizes in a(n) _____ cubic...

Quiz 13: The Solid State