Question 1

Which of the following pairs of compounds is most likely to be immiscible?

Accepted Answer

A) Br2 and C6H6 
B) H2O and CH3CH2OH 
C) CCl4 and H2CO 
D) CH3OH and CH3CH2OH 
E) H2O and NH3 
A) Br2 and C6H6 
B) H2O and CH3CH2OH 
C) CCl4 and H2CO 
D) CH3OH and CH3CH2OH 
E) H2O and NH3

Question 2

Maple syrup is harder to pour out of a container than water due to its ________

Accepted Answer

A) boiling point. 
B) surface tension. 
C) compressibility. 
D) viscosity. 
E) higher molecular weight. 
A) boiling point. 
B) surface tension. 
C) compressibility. 
D) viscosity. 
E) higher molecular weight.

Question 3

The phase diagram for carbon dioxide is shown below. What are the phase changes in order as carbon dioxide is cooled from 40oC to F1F1F1S1F1F1F1070oC, at 200 atm pressure?

Accepted Answer

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

Question 4

Which of the following compounds is capable of dipole-dipole interactions?

Accepted Answer

A) CH4 
B) CO2 
C) H2CO 
D) SF6 
E) NH4F1F1F1S1F1F1F10 
A) CH4 
B) CO2 
C) H2CO 
D) SF6 
E) NH4F1F1F1S1F1F1F10

Question 5

Consider the phase diagram for a substance such as the one shown here. If the line between the solid and liquid phases has a negative slope, then the solid phase is ________ than the liquid phase.

Accepted Answer

A) more dense 
B) less dense 
C) more massive 
D) less massive 
E) hotter 
A) more dense 
B) less dense 
C) more massive 
D) less massive 
E) hotter

Question 6

The structure of an unsaturated phospholipid is shown below. Which region of the molecule is most hydrophilic?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) All regions are equally hydrophilic. 
A) I 
B) II 
C) III 
D) IV 
E) All regions are equally hydrophilic.

Question 7

The phase diagram for carbon dioxide is shown below. What are the phase changes in order as the pressure is increased starting at 0.5 atm, and the temperature is kept at F1F1F1S1F1F1F1080oC?

Accepted Answer

A) solid   gas 
B) solid   liquid   gas 
C) liquid   gas 
D) gas   solid 
E) gas   liquid 
A) solid   gas 
B) solid   liquid   gas 
C) liquid   gas 
D) gas   solid 
E) gas   liquid

Question 8

Which of the following compounds would be most soluble in water?

Accepted Answer

A) CH4 
B) H2 
C) N2 
D) C2H4 
E) CH3OH 
A) CH4 
B) H2 
C) N2 
D) C2H4 
E) CH3OH

Question 9

Why do gases behave nonideally at high pressures and low temperatures?

Accepted Answer

The ideal gas model neglects intermolecu

Question 10

Under similar conditions, which of the following gases will behave less like an ideal gas than the others?

Accepted Answer

A) NH3 
B) HCl 
C) CH4 
D) H2 
E) O2 
A) NH3 
B) HCl 
C) CH4 
D) H2 
E) O2

Question 11

Which is the dominant interaction between oxygen and nitrogen molecules in air?

Accepted Answer

A) ion-ion 
B) ion-dipole 
C) dipole-dipole 
D) hydrogen bonding 
E) dispersion or London forces 
A) ion-ion 
B) ion-dipole 
C) dipole-dipole 
D) hydrogen bonding 
E) dispersion or London forces

Question 12

Which of the following substances has a solid that is less dense than the liquid?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 13

Which is the dominant interaction that leads to the formation of a hydration sphere in a salt solution?

Accepted Answer

A) ion-ion 
B) ion-dipole 
C) dipole-dipole 
D) hydrogen bonding 
E) dispersion or London forces 
A) ion-ion 
B) ion-dipole 
C) dipole-dipole 
D) hydrogen bonding 
E) dispersion or London forces

Question 14

Which of the following compounds would you expect to be a solid at room temperature and atmospheric pressure?

Accepted Answer

A) C2H4 (an alkene) 
B) HCl (an acid) 
C) CH3CH2CH2CH3 (an alkane) 
D) C10H8 (an aromatic hydrocarbon) 
E) C6H6 (an aromatic hydrocarbon) 
A) C2H4 (an alkene) 
B) HCl (an acid) 
C) CH3CH2CH2CH3 (an alkane) 
D) C10H8 (an aromatic hydrocarbon) 
E) C6H6 (an aromatic hydrocarbon)

Question 15

Henry's law constant (mol/L · atm) for carbon dioxide dissolving in water is 3.50 F1F1F1S1F1F1F10 10F1F1F1S1F1F1F102 mol/(L atm) at 20F1F1F1S1F1F1F10C. Calculate the molar concentration of carbon dioxide in a soda can where the air pressure is 2.45 atm. The mole fraction of carbon dioxide in air is 0.0397.

Accepted Answer

3.4 @#IMG-DLM& F1F1F

Question 16

Condensation occurs in going from region ________

Accepted Answer

A) I to II. 
B) I to III. 
C) II to III. 
D) III to II. 
E) III to I. 
A) I to II. 
B) I to III. 
C) II to III. 
D) III to II. 
E) III to I.

Question 17

The phase diagram for carbon dioxide is shown below. What are the phase changes in order as carbon dioxide is heated from -90oC to 50oC, at 1 atm pressure?

Accepted Answer

A) solid   gas 
B) solid   liquid   gas 
C) liquid   gas 
D) gas   liquid   solid 
E) gas   liquid 
A) solid   gas 
B) solid   liquid   gas 
C) liquid   gas 
D) gas   liquid   solid 
E) gas   liquid

Question 18

Which of the following compounds do you expect to be most soluble in water?

Accepted Answer

A) CO2 
B) CCl4 
C) O2 
D) SiO2 
E) NH3 
A) CO2 
B) CCl4 
C) O2 
D) SiO2 
E) NH3

Question 19

If water contains about 42 mg of oxygen per liter at 20F1F1F1S1F1F1F10C and 1.0 atm, what would be the value of Henry's law constant for oxygen dissolving in water? The mole fraction of oxygen in air is 0.21.

Accepted Answer

A) 0.25 mol/(L atm) 
B) 1.3   F1F1F1S1F1F1F1010F1F1F1S1F1F1F103 mol/(L atm) 
C) 1.9   F1F1F1S1F1F1F1010F1F1F1S1F1F1F102 mol/(L atm) 
D) 6.3   F1F1F1S1F1F1F1010-3 mol/(L atm) 
E) 0.010 mol/(L atm) 
A) 0.25 mol/(L atm) 
B) 1.3   F1F1F1S1F1F1F1010F1F1F1S1F1F1F103 mol/(L atm) 
C) 1.9   F1F1F1S1F1F1F1010F1F1F1S1F1F1F102 mol/(L atm) 
D) 6.3   F1F1F1S1F1F1F1010-3 mol/(L atm) 
E) 0.010 mol/(L atm)

Question 20

Indicate which of the following pairs of compounds is most likely to be miscible.

Accepted Answer

A) H2O and CH3CH2CH2CH3 
B) Br2 and HI 
C) HF and CCl4 
D) CCl4 and Br2 
E) CCl4 and NH3 
A) H2O and CH3CH2CH2CH3 
B) Br2 and HI 
C) HF and CCl4 
D) CCl4 and Br2 
E) CCl4 and NH3

Exam 10: Intermolecular Forces: The Uniqueness of Water

Which of the following pairs of compounds is most likely to be immiscible?

Maple syrup is harder to pour out of a container than water due to its ________

The phase diagram for carbon dioxide is shown below. What are the phase changes in order as carbon dioxide is cooled from 40oC to 70oC, at 200 atm pressure?

Which of the following compounds is capable of dipole-dipole interactions?

Consider the phase diagram for a substance such as the one shown here. If the line between the solid and liquid phases has a negative slope, then the solid phase is ________ than the liquid phase.

The structure of an unsaturated phospholipid is shown below. Which region of the molecule is most hydrophilic?

The phase diagram for carbon dioxide is shown below. What are the phase changes in order as the pressure is increased starting at 0.5 atm, and the temperature is kept at 80oC?

Which of the following compounds would be most soluble in water?

Why do gases behave nonideally at high pressures and low temperatures?

Under similar conditions, which of the following gases will behave less like an ideal gas than the others?

Which is the dominant interaction between oxygen and nitrogen molecules in air?

Which of the following substances has a solid that is less dense than the liquid?

Which is the dominant interaction that leads to the formation of a hydration sphere in a salt solution?

Which of the following compounds would you expect to be a solid at room temperature and atmospheric pressure?

Henry's law constant (mol/L · atm) for carbon dioxide dissolving in water is 3.50  102 mol/(L atm) at 20C. Calculate the molar concentration of carbon dioxide in a soda can where the air pressure is 2.45 atm. The mole fraction of carbon dioxide in air is 0.0397.

Condensation occurs in going from region ________

The phase diagram for carbon dioxide is shown below. What are the phase changes in order as carbon dioxide is heated from -90oC to 50oC, at 1 atm pressure?

Which of the following compounds do you expect to be most soluble in water?

If water contains about 42 mg of oxygen per liter at 20C and 1.0 atm, what would be the value of Henry's law constant for oxygen dissolving in water? The mole fraction of oxygen in air is 0.21.

Indicate which of the following pairs of compounds is most likely to be miscible.

Matter and Energy: The Origin of the Universe

Atoms, Ions, and Molecules: Matter Starts Here

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: The Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Solutions: Properties and Behavior

Solids: Crystals, Alloys, and Polymers

Chemical Kinetics: Reactions in the Atmosphere

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acidbase Equilibria: Proton Transfer in Biological Systems

Additional Aqueous Equilibria: Chemistry and the Oceans

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: The Quest for Clean Energy

Nuclear Chemistry: Applications to Energy and Medicine

Organic and Biological Molecules: the Compounds of Life

The Main Group Elements: Life and the Periodic Table

Transition Metals: Biological and Medical Applications

Filters

The phase diagram for carbon dioxide is shown below. What are the phase changes in order as carbon dioxide is cooled from 40^oC to 70^oC, at 200 atm pressure?

The phase diagram for carbon dioxide is shown below. What are the phase changes in order as the pressure is increased starting at 0.5 atm, and the temperature is kept at 80^oC?

Henry's law constant (mol/L · atm) for carbon dioxide dissolving in water is 3.50  10^² mol/(L atm) at 20C. Calculate the molar concentration of carbon dioxide in a soda can where the air pressure is 2.45 atm. The mole fraction of carbon dioxide in air is 0.0397.

The phase diagram for carbon dioxide is shown below. What are the phase changes in order as carbon dioxide is heated from -90^oC to 50^oC, at 1 atm pressure?