Question 1

Solutions in which intermolecular forces are stronger in the solution than in the pure components have negative enthalpies of mixing.

Accepted Answer

A) True 
 B)False

Question 2

The condition called the bends results from the rapid release of nitrogen gas in the bloodstream when the diver returns to the surface.Would argon gas or hydrogen gas be suitable replacements for nitrogen gas in "compressed air?" Explain.

Accepted Answer

No,both ar

Question 3

The phase diagram for a pure compound is given below.All of the following could have a similar phase diagram except

Accepted Answer

A) methanol 
B) carbon dioxide 
C) benzene 
D) carbon tetrachloride 
E) water 
A) methanol 
B) carbon dioxide 
C) benzene 
D) carbon tetrachloride 
E) water

Question 4

The solubility of oxygen at a certain temperature is 8 ppm.If the partial pressure of oxygen is doubled at this temperature,the solubility is 16 ppm.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following pairs have a vant Hoff i factor of 3?

Accepted Answer

A) Sodium sulfate and potassium chloride 
B) Calcium chloride and potassium sulfate 
C) Magnesium sulfate and ethylene glycol 
D) Glucose and sodium chloride 
E) Perchloric acid and barium hydroxide 
A) Sodium sulfate and potassium chloride 
B) Calcium chloride and potassium sulfate 
C) Magnesium sulfate and ethylene glycol 
D) Glucose and sodium chloride 
E) Perchloric acid and barium hydroxide

Question 6

The phase diagram for a pure substance is shown below.What is the critical pressure?

Accepted Answer

A) 50 atm 
B) 150 atm 
C) 325 atm 
D) Any pressure above 325 atm 
E) 200 atm 
A) 50 atm 
B) 150 atm 
C) 325 atm 
D) Any pressure above 325 atm 
E) 200 atm

Question 7

The vapor pressure of benzene at 25S1U1P1$\circ$S1S1P0C is 94.6 Torr and its enthalpy of vaporization is 30.8 kJ.mol-1 .Estimate the normal boiling point of benzene.Assume the enthalpy of vaporization is independent of temperature.

Accepted Answer

A) 640 K 
B) 358 K 
C) 470 K 
D) 624 K 
E) Not enough information given. 
A) 640 K 
B) 358 K 
C) 470 K 
D) 624 K 
E) Not enough information given.

Question 8

The phase diagram for a pure substance is given below.   What pressure must be applied to liquefy a sample at 425 K?

Accepted Answer

A) 350 atm 
B) The sample cannot be liquefied at 425 K. 
C) 150 atm 
D) 50 atm 
E) 250 atm 
A) 350 atm 
B) The sample cannot be liquefied at 425 K. 
C) 150 atm 
D) 50 atm 
E) 250 atm

Question 9

Calculate the molality of perchloric acid in 9.2 M HClO4(aq).The density of this solution is 1.54 g/mL.

Accepted Answer

Question 10

The phase diagram for sulfur is given below.   The number of phases that sulfur can exist in and the number of triple points,respectively,are

Accepted Answer

A) 3 and 2. 
B) 3 and 3. 
C) 4 and 2. 
D) 3 and 1. 
E) 4 and 3. 
A) 3 and 2. 
B) 3 and 3. 
C) 4 and 2. 
D) 3 and 1. 
E) 4 and 3.

Question 11

the van't Hoff i of HBr,HCl,and HF should all be the same?

Accepted Answer

A) True 
 B)False

Question 12

What is the highest temperature that the substance shown in the following phase diagram can exist as a liquid?

Accepted Answer

A) any temperature above 200 K 
B) 200 K 
C) 250 K 
D) 350 K 
E) 400 K 
A) any temperature above 200 K 
B) 200 K 
C) 250 K 
D) 350 K 
E) 400 K

Question 13

A plot of ln(vapor pressure)versus 1/T for benzene gives a straight line with slope -3.70 * 103 K.The enthalpy of vaporization of benzene is

Accepted Answer

A) 2.25 kJ.mol-1  
B) Not enough information is given to permit the calculation. 
C) 3.70 kJ.mol-1  
D) 30.8 kJ.mol-1  
E) 445 J.mol-1  
A) 2.25 kJ.mol-1  
B) Not enough information is given to permit the calculation. 
C) 3.70 kJ.mol-1  
D) 30.8 kJ.mol-1  
E) 445 J.mol-1

Question 14

the van't Hoff i of HF differs from that of HCl?

Accepted Answer

A) True 
 B)False

Question 15

Because a solute increases the entropy of the liquid phase while the enthalpy is left unchanged,there is a decrease in the molar free energy of the solvent.

Accepted Answer

A) True 
 B)False

Question 16

Consider the phase diagrams for water and carbon dioxide given in the text on page 315.Explain the significance of the slopes of the solid-liquid lines.

Accepted Answer

For water,the solid is less de

Question 17

Of the following five materials,which has the lowest freezing point and the highest boiling point?

Accepted Answer

A) 1.5 m magnesium phosphate 
B) 2.0 m potassium chloride 
C) 1.0 m sodium chloride 
D) 1.5 m aluminum nitrate 
E) 1.5 m calcium chloride 
A) 1.5 m magnesium phosphate 
B) 2.0 m potassium chloride 
C) 1.0 m sodium chloride 
D) 1.5 m aluminum nitrate 
E) 1.5 m calcium chloride

Question 18

An animal cell assumes its normal volume when it is placed in a solution with a total solute molarity of 0.3 M.If the cell is placed in a solution with a total solute molarity of 0.1 M,

Accepted Answer

A) water enters the cell,causing expansion. 
B) water leaves the cell,causing contraction. 
C) the escaping tendency of water in the cell increases. 
D) no movement of water takes place. 
A) water enters the cell,causing expansion. 
B) water leaves the cell,causing contraction. 
C) the escaping tendency of water in the cell increases. 
D) no movement of water takes place.

Question 19

Consider the phase diagram for CO2 in the text on page 315.A sample of carbon dioxide at 10S1U1P1$\circ$S1S1P0C and 10 atm is a liquid.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following 1.0 M solutions contains the most particles?

Accepted Answer

A) Ethylene glycol 
B) Potassium chloride 
C) Magnesium sulfate 
D) Glucose 
E) Sodium sulfate 
A) Ethylene glycol 
B) Potassium chloride 
C) Magnesium sulfate 
D) Glucose 
E) Sodium sulfate

Solutions in which intermolecular forces are stronger in the solution than in the pure components have negative enthalpies of mixing.

The condition called the bends results from the rapid release of nitrogen gas in the bloodstream when the diver returns to the surface.Would argon gas or hydrogen gas be suitable replacements for nitrogen gas in "compressed air?" Explain.

The phase diagram for a pure compound is given below.All of the following could have a similar phase diagram except

The solubility of oxygen at a certain temperature is 8 ppm.If the partial pressure of oxygen is doubled at this temperature,the solubility is 16 ppm.

Which of the following pairs have a vant Hoff i factor of 3?

The phase diagram for a pure substance is shown below.What is the critical pressure?

The vapor pressure of benzene at 25^$\circ$C is 94.6 Torr and its enthalpy of vaporization is 30.8 kJ.mol^-1.Estimate the normal boiling point of benzene.Assume the enthalpy of vaporization is independent of temperature.

The phase diagram for a pure substance is given below. What pressure must be applied to liquefy a sample at 425 K?

Calculate the molality of perchloric acid in 9.2 M HClO₄(aq).The density of this solution is 1.54 g/mL.

The phase diagram for sulfur is given below. The number of phases that sulfur can exist in and the number of triple points,respectively,are

the van't Hoff i of HBr,HCl,and HF should all be the same?

What is the highest temperature that the substance shown in the following phase diagram can exist as a liquid?

A plot of ln(vapor pressure)versus 1/T for benzene gives a straight line with slope -3.70 * 10³ K.The enthalpy of vaporization of benzene is

the van't Hoff i of HF differs from that of HCl?

Because a solute increases the entropy of the liquid phase while the enthalpy is left unchanged,there is a decrease in the molar free energy of the solvent.

Consider the phase diagrams for water and carbon dioxide given in the text on page 315.Explain the significance of the slopes of the solid-liquid lines.

Of the following five materials,which has the lowest freezing point and the highest boiling point?

An animal cell assumes its normal volume when it is placed in a solution with a total solute molarity of 0.3 M.If the cell is placed in a solution with a total solute molarity of 0.1 M,

Consider the phase diagram for CO₂ in the text on page 315.A sample of carbon dioxide at 10^$\circ$C and 10 atm is a liquid.

Which of the following 1.0 M solutions contains the most particles?

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

Molecular Shape and Structure

The Properties of Gases

Liquids and Solids

Inorganic Materials

Thermodynamics: The First Law

Thermodynamics: The Second and Third Laws

Chemical Equilibria

Acids and Bases

Aqueous Equilibria

Electrochemistry

Chemical Kinetics

The Elements: the Main Group Elements

The Elements: The D Block

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Organic Chemistry I

Organic Chemistry II

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Exam 10: Physical Equilibria

Solutions in which intermolecular forces are stronger in the solution than in the pure components have negative enthalpies of mixing.

The condition called the bends results from the rapid release of nitrogen gas in the bloodstream when the diver returns to the surface.Would argon gas or hydrogen gas be suitable replacements for nitrogen gas in "compressed air?" Explain.

The phase diagram for a pure compound is given below.All of the following could have a similar phase diagram except

The solubility of oxygen at a certain temperature is 8 ppm.If the partial pressure of oxygen is doubled at this temperature,the solubility is 16 ppm.

Which of the following pairs have a vant Hoff i factor of 3?

The phase diagram for a pure substance is shown below.What is the critical pressure?

The vapor pressure of benzene at 25 ∘\circ∘ C is 94.6 Torr and its enthalpy of vaporization is 30.8 kJ.mol-1 .Estimate the normal boiling point of benzene.Assume the enthalpy of vaporization is independent of temperature.

The phase diagram for a pure substance is given below. What pressure must be applied to liquefy a sample at 425 K?

Calculate the molality of perchloric acid in 9.2 M HClO4(aq).The density of this solution is 1.54 g/mL.

The phase diagram for sulfur is given below. The number of phases that sulfur can exist in and the number of triple points,respectively,are

the van't Hoff i of HBr,HCl,and HF should all be the same?

What is the highest temperature that the substance shown in the following phase diagram can exist as a liquid?

A plot of ln(vapor pressure)versus 1/T for benzene gives a straight line with slope -3.70 * 103 K.The enthalpy of vaporization of benzene is

the van't Hoff i of HF differs from that of HCl?

Because a solute increases the entropy of the liquid phase while the enthalpy is left unchanged,there is a decrease in the molar free energy of the solvent.

Consider the phase diagrams for water and carbon dioxide given in the text on page 315.Explain the significance of the slopes of the solid-liquid lines.

Of the following five materials,which has the lowest freezing point and the highest boiling point?

An animal cell assumes its normal volume when it is placed in a solution with a total solute molarity of 0.3 M.If the cell is placed in a solution with a total solute molarity of 0.1 M,

Consider the phase diagram for CO2 in the text on page 315.A sample of carbon dioxide at 10 ∘\circ∘ C and 10 atm is a liquid.

Which of the following 1.0 M solutions contains the most particles?

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

Molecular Shape and Structure

The Properties of Gases

Liquids and Solids

Inorganic Materials

Thermodynamics: The First Law

Thermodynamics: The Second and Third Laws

Chemical Equilibria

Acids and Bases

Aqueous Equilibria

Electrochemistry

Chemical Kinetics

The Elements: the Main Group Elements

The Elements: The D Block

Nuclear Chemistry

Organic Chemistry I

Organic Chemistry II

Filters

The vapor pressure of benzene at 25^$\circ$C is 94.6 Torr and its enthalpy of vaporization is 30.8 kJ.mol^-1.Estimate the normal boiling point of benzene.Assume the enthalpy of vaporization is independent of temperature.

Calculate the molality of perchloric acid in 9.2 M HClO₄(aq).The density of this solution is 1.54 g/mL.

A plot of ln(vapor pressure)versus 1/T for benzene gives a straight line with slope -3.70 * 10³ K.The enthalpy of vaporization of benzene is

Consider the phase diagram for CO₂ in the text on page 315.A sample of carbon dioxide at 10^$\circ$C and 10 atm is a liquid.