Question 1

The normal boiling point of this substance is approximately

Accepted Answer

A) 25°C. 
B) 140°C. 
C) 300°C. 
D) 350°C. 
A) 25°C. 
B) 140°C. 
C) 300°C. 
D) 350°C.

Question 2

What is the physical phase of the substance at T = 400 K and P = 2.0 atm?

Accepted Answer

A) gas 
B) liquid 
C) solid 
D) supercritical fluid 
A) gas 
B) liquid 
C) solid 
D) supercritical fluid

Question 3

Which is expected to have the highest surface tension at 25°?

Accepted Answer

A) C7H16 
B) C8H10 
C) C5H11OH 
D) C3H5(OH)3 
A) C7H16 
B) C8H10 
C) C5H11OH 
D) C3H5(OH)3

Question 4

A certain mineral,MS1U1B1xS1U1B0M'S1U1B1yS1U1B0AS1U1B1zS1U1B0,crystallizes in the cubic unit cell shown below.M and M' represent cations and A represents the anions.  
-How many anions are in the unit cell?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 6 
A) 1 
B) 2 
C) 3 
D) 6

Question 5

A certain mineral crystallizes in the cubic unit cell shown below.  
-What kind of packing do the anions adopt?

Accepted Answer

A) body-centered cubic 
B) cubic closest packed (face-centered cubic) 
C) hexagonal closest packed 
D) simple cubic 
A) body-centered cubic 
B) cubic closest packed (face-centered cubic) 
C) hexagonal closest packed 
D) simple cubic

Question 6

Manganese crystallizes in a body-centered cubic structure.What is the coordination number of each atom?

Accepted Answer

A) 4 
B) 6 
C) 8 
D) 12 
A) 4 
B) 6 
C) 8 
D) 12

Question 7

A kitchen pressure cooker operates at 1.70 atm.The ΔHvap of water is 40.7 kJ/mol.What is the boiling point of water in the pressure cooker?

Accepted Answer

A) 380 K 
B) 373 K 
C) 389 K 
D) 400 K 
A) 380 K 
B) 373 K 
C) 389 K 
D) 400 K

Question 8

Which transition could occur if a solid is heated at a pressure below the triple point pressure?

Accepted Answer

A) condensation 
B) deposition 
C) melting 
D) sublimation 
A) condensation 
B) deposition 
C) melting 
D) sublimation

Question 9

Lead has a radius of 154 pm and crystallizes in a face-centered cubic unit cell.What is the edge length of the unit cell?

Accepted Answer

A) 35 pm 
B) 54 pm 
C) 1232 pm 
D) 436 pm 
A) 35 pm 
B) 54 pm 
C) 1232 pm 
D) 436 pm

Question 10

Which of the following forms a metallic solid?

Accepted Answer

A) gold 
B) potassium bromide 
C) quartz 
D) plastic 
A) gold 
B) potassium bromide 
C) quartz 
D) plastic

Question 11

How much heat (kJ)is required to convert 3.12 moles of liquid benzene at 75.1°C to gaseous benzene at 115.1°C? The following information may be useful. b.p = 80.1ᴼC
Cm (liquid benzene)= 136.0 J/ (mol * °C)
ΔHvap = 30.72 kJ/mol
Cm (gaseous benzene)= 36.6 J/ (mol * °C)

Accepted Answer

A) 94.0 
B) 101965 
C) 36.8 
D) 102.0 
A) 94.0 
B) 101965 
C) 36.8 
D) 102.0

Question 12

The edge length of a face-centered cubic lattice of NaCl is 564 pm.What is the density of NaCl in g/cm3?

Accepted Answer

A) 0.720 
B) 1.08 
C) 2.16 
D) 4.32 
A) 0.720 
B) 1.08 
C) 2.16 
D) 4.32

Question 13

How many Br- ions are around each K+ ion in KBr,which has a cubic unit cell with Br- ions on each corner and each face?

Accepted Answer

A) 1 
B) 4 
C) 6 
D) 8 
A) 1 
B) 4 
C) 6 
D) 8

Question 14

Rubber is classified as an ________ solid,whereas diamond is classified as a ________ solid.

Accepted Answer

amorphous,

Question 15

Iron crystallizes in a body-centered cubic cell having an edge length of 287 pm.What is the density of iron in g/cm3?

Accepted Answer

A) 1.99 
B) 7.85 
C) 11.9 
D) 15.9 
A) 1.99 
B) 7.85 
C) 11.9 
D) 15.9

Question 16

The critical temperature of a substance is the

Accepted Answer

A) highest temperature at which the liquid phase can exist in equilibrium with the gas phase. 
B) temperature above which the compound decomposes. 
C) temperature at which all three phases can exist in equilibrium. 
D) temperature at which sublimation occurs. 
A) highest temperature at which the liquid phase can exist in equilibrium with the gas phase. 
B) temperature above which the compound decomposes. 
C) temperature at which all three phases can exist in equilibrium. 
D) temperature at which sublimation occurs.

Question 17

Bromine is one of only two elements that is a liquid at room temperature.Bromine has a heat of vaporization of 30.91 kJ/mol and its boiling point is 59°C.What is the entropy of vaporization for bromine?

Accepted Answer

A) -301 J/(mol ∙ K) 
B) -93.1 J/(mol ∙ K) 
C) 10.7 J/(mol ∙ K) 
D) 93.1 J/(mol ∙ K) 
A) -301 J/(mol ∙ K) 
B) -93.1 J/(mol ∙ K) 
C) 10.7 J/(mol ∙ K) 
D) 93.1 J/(mol ∙ K)

Question 18

An ionic compound crystallizes in a unit cell having a face-centered cubic array of metal ions,Mn+,and all of the tetrahedral holes occupied by anions,X-.The empirical formula of this ionic compound is

Accepted Answer

A) MX. 
B) MX2. 
C) M2X. 
D) M7X4. 
A) MX. 
B) MX2. 
C) M2X. 
D) M7X4.

Question 19

The phase diagram of a substance is shown below.  
-The approximate normal boiling point of this substance is

Accepted Answer

A) 180 K. 
B) 190 K. 
C) 300 K. 
D) 430 K. 
A) 180 K. 
B) 190 K. 
C) 300 K. 
D) 430 K.

Question 20

The plots below represent vapor pressure vs.temperature curves for diethyl ether,ethanol,mercury,and water,not necessarily in that order.  
-Based on the relative strengths of the intermolecular forces of attraction of each substance,which is the most likely vapor pressure vs.temperature curve for ethanol?

Accepted Answer

A) curve (a) 
B) curve (b) 
C) curve (c) 
D) curve (d) 
A) curve (a) 
B) curve (b) 
C) curve (c) 
D) curve (d)

Exam 11: Liquids, solids, and Phase Changes

The normal boiling point of this substance is approximately

What is the physical phase of the substance at T = 400 K and P = 2.0 atm?

Which is expected to have the highest surface tension at 25°?

A certain mineral,MxM'yAz,crystallizes in the cubic unit cell shown below.M and M' represent cations and A represents the anions. -How many anions are in the unit cell?

A certain mineral crystallizes in the cubic unit cell shown below. -What kind of packing do the anions adopt?

Manganese crystallizes in a body-centered cubic structure.What is the coordination number of each atom?

A kitchen pressure cooker operates at 1.70 atm.The ΔHvap of water is 40.7 kJ/mol.What is the boiling point of water in the pressure cooker?

Which transition could occur if a solid is heated at a pressure below the triple point pressure?

Lead has a radius of 154 pm and crystallizes in a face-centered cubic unit cell.What is the edge length of the unit cell?

Which of the following forms a metallic solid?

How much heat (kJ)is required to convert 3.12 moles of liquid benzene at 75.1°C to gaseous benzene at 115.1°C? The following information may be useful. b.p = 80.1ᴼC Cm (liquid benzene)= 136.0 J/ (mol * °C) ΔHvap = 30.72 kJ/mol Cm (gaseous benzene)= 36.6 J/ (mol * °C)

The edge length of a face-centered cubic lattice of NaCl is 564 pm.What is the density of NaCl in g/cm3?

How many Br- ions are around each K+ ion in KBr,which has a cubic unit cell with Br- ions on each corner and each face?

Rubber is classified as an ________ solid,whereas diamond is classified as a ________ solid.

Iron crystallizes in a body-centered cubic cell having an edge length of 287 pm.What is the density of iron in g/cm3?

The critical temperature of a substance is the

Bromine is one of only two elements that is a liquid at room temperature.Bromine has a heat of vaporization of 30.91 kJ/mol and its boiling point is 59°C.What is the entropy of vaporization for bromine?

An ionic compound crystallizes in a unit cell having a face-centered cubic array of metal ions,Mn+,and all of the tetrahedral holes occupied by anions,X-.The empirical formula of this ionic compound is

The phase diagram of a substance is shown below. -The approximate normal boiling point of this substance is

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

Connections to Organic and Biological Chemistry

Filters

A certain mineral,M_xM'_yA_z,crystallizes in the cubic unit cell shown below.M and M' represent cations and A represents the anions. -How many anions are in the unit cell?

A kitchen pressure cooker operates at 1.70 atm.The ΔH_vap of water is 40.7 kJ/mol.What is the boiling point of water in the pressure cooker?

How much heat (kJ)is required to convert 3.12 moles of liquid benzene at 75.1°C to gaseous benzene at 115.1°C? The following information may be useful. b.p = 80.1ᴼC C_m(liquid benzene)= 136.0 J/ (mol * °C) ΔH_vap = 30.72 kJ/mol C_m(gaseous benzene)= 36.6 J/ (mol * °C)

The edge length of a face-centered cubic lattice of NaCl is 564 pm.What is the density of NaCl in g/cm³?

How many Br^- ions are around each K⁺ ion in KBr,which has a cubic unit cell with Br^- ions on each corner and each face?

Rubber is classified as an solid,whereas diamond is classified as a solid.

Iron crystallizes in a body-centered cubic cell having an edge length of 287 pm.What is the density of iron in g/cm³?

An ionic compound crystallizes in a unit cell having a face-centered cubic array of metal ions,Mⁿ⁺,and all of the tetrahedral holes occupied by anions,X^-.The empirical formula of this ionic compound is