Question 1

the triple point for water,4.6 Torr and 0.01S1U1P1$\circ$S1S1P0C,varies depending on conditions?

Accepted Answer

A) True 
 B)False

Question 2

Which of the following is likely to have the largest exothermic hydration enthalpy?

Accepted Answer

A) Sr2+  
B) Na+  
C) Mg2+  
D) Ca2+  
E) Li+  
A) Sr2+  
B) Na+  
C) Mg2+  
D) Ca2+  
E) Li+

Question 3

If you wanted to study solutions of different concentrations at different temperatures,would you use molarity or molality as your measure of concentration? Why?

Accepted Answer

molality,b

Question 4

For a one-component system,at the triple point

Accepted Answer

A) f = 3. 
B) f = 2. 
C) p = 1. 
D) f = 0. 
E) f = 1. 
A) f = 3. 
B) f = 2. 
C) p = 1. 
D) f = 0. 
E) f = 1.

Question 5

What is the molality of CrCl3 in a solution prepared by dissolving 75.2 g of chromium(III)chloride hexahydrate in 250.0 g of water.

Accepted Answer

A) 0.282 m 
B) 1.13 m 
C) 7.60 m 
D) 5.64 m 
E) 1.90 m 
A) 0.282 m 
B) 1.13 m 
C) 7.60 m 
D) 5.64 m 
E) 1.90 m

Question 6

Rank the following species in order of increasing vapor pressure at 25S1U1P1$\circ$S1S1P0C.
water,diethyl ether,ethanol,mercury

Accepted Answer

mercury <

Question 7

Of the following solutes,which is likely to be most soluble in water?
A)Br2 
B)carbon tetrachloride,CCl4
C)CS2
D)ethanol,CH3CH2OH

Accepted Answer

Question 8

On what conditions does the location of the triple point for water-4.6 Torr and 0.01S1U1P1$\circ$S1S1P0C -depend?

Accepted Answer

None; it i

Question 9

For CaCl2,the enthalpies of hydration and solution are -2337 and -81 kJ.mol-1,respectively,at 25S1U1P1$\circ$S1S1P0C.Calculate the lattice enthalpy of calcium chloride.

Accepted Answer

+2256 k.mo

Question 10

Which liquid would you expect to be the more volatile,CH3CHO or CH3OCH3?

Accepted Answer

Question 11

The phase diagram for a pure substance is shown below.   What is the lowest temperature at which liquid can exist?

Accepted Answer

A) 400 K 
B) 0 K 
C) 200 K 
D) 150 K 
E) 250 K 
A) 400 K 
B) 0 K 
C) 200 K 
D) 150 K 
E) 250 K

Question 12

With which of the following solutes can water most readily hydrogen bond?

Accepted Answer

A) ethanol,CH3CH2OH 
B) carbon tetrachloride,CCl4 
C) Br2  
D) CS2  
E) benzene C6H6 
A) ethanol,CH3CH2OH 
B) carbon tetrachloride,CCl4 
C) Br2  
D) CS2  
E) benzene C6H6

Question 13

Consider the phase diagram for sulfur in the text on page 316.Monoclinic sulfur is denser than rhombic sulfur.

Accepted Answer

A) True 
 B)False

Question 14

The normal boiling point of ethanol is 78S1U1P1$\circ$S1S1P0C.If the vapor pressure of ethanol is 13.3 kPa at 34.9S1U1P1$\circ$S1S1P0C,calculate the enthalpy of vaporization of ethanol.

Accepted Answer

The answer of The normal boiling point of ethanol is...

Question 15

The phase diagram for CO2 is given below.The triple point is at 5.1 atm and 217 K.   What happens if CO2(l)at 30 atm and 450 K is released into a room at 1 atm and 298 K?

Accepted Answer

A) The liquid vaporizes. 
B) The liquid remains stable. 
C) The liquid and vapor are in equilibrium. 
D) The liquid and solid are in equilibrium. 
E) The liquid freezes. 
A) The liquid vaporizes. 
B) The liquid remains stable. 
C) The liquid and vapor are in equilibrium. 
D) The liquid and solid are in equilibrium. 
E) The liquid freezes.

Question 16

The vapor pressures of pure carbon disulfide and carbon tetrachloride are 360 and 99.8 Torr,respectively,at 296 K.What is the vapor pressure of a solution containing 50.0 g of each compound?

Accepted Answer

A) 241 Torr 
B) 33.0 Torr 
C) 260 Torr 
D) 274 Torr 
E) 460 Torr 
A) 241 Torr 
B) 33.0 Torr 
C) 260 Torr 
D) 274 Torr 
E) 460 Torr

Question 17

Consider the phase diagrams for water and carbon dioxide given in the text on page 315.Explain the following observations: A thin wire with weights attached is draped over a block of "dry ice," a second wire with weights is draped over a block of ice.The wire cuts through the ice but not through the "dry ice."

Accepted Answer

For water,increased pressure r

Question 18

In a closed vessel containing water the pressure is 18 Torr.If more water is added to the vessel,the pressure

Accepted Answer

A) remains the same. 
B) becomes larger. 
C) becomes smaller. 
A) remains the same. 
B) becomes larger. 
C) becomes smaller.

Question 19

Calculate the concentration of argon in lake water at 20S1U1P1$\circ$S1S1P0C.The partial pressure of argon is 0.0090 atm and Henrys constant is 0.0015 mol.L-1.atm-1.

Accepted Answer

A) 1.5 * 10-3 M 
B) 9.0 * 10-3 M 
C) 1.4 *10-5 M 
D) 6.0 M 
E) 0.17 M 
A) 1.5 * 10-3 M 
B) 9.0 * 10-3 M 
C) 1.4 *10-5 M 
D) 6.0 M 
E) 0.17 M

Question 20

Which of the following has the lowest freezing point?

Accepted Answer

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

the triple point for water,4.6 Torr and 0.01^$\circ$C,varies depending on conditions?

Which of the following is likely to have the largest exothermic hydration enthalpy?

If you wanted to study solutions of different concentrations at different temperatures,would you use molarity or molality as your measure of concentration? Why?

For a one-component system,at the triple point

What is the molality of CrCl₃ in a solution prepared by dissolving 75.2 g of chromium(III)chloride hexahydrate in 250.0 g of water.

Rank the following species in order of increasing vapor pressure at 25^$\circ$C. water,diethyl ether,ethanol,mercury

Of the following solutes,which is likely to be most soluble in water? A)Br₂ B)carbon tetrachloride,CCl₄ C)CS₂ D)ethanol,CH₃CH₂OH

On what conditions does the location of the triple point for water-4.6 Torr and 0.01^$\circ$C -depend?

For CaCl₂,the enthalpies of hydration and solution are -2337 and -81 kJ.mol^-1,respectively,at 25^$\circ$C.Calculate the lattice enthalpy of calcium chloride.

Which liquid would you expect to be the more volatile,CH₃CHO or CH₃OCH₃?

The phase diagram for a pure substance is shown below. What is the lowest temperature at which liquid can exist?

With which of the following solutes can water most readily hydrogen bond?

Consider the phase diagram for sulfur in the text on page 316.Monoclinic sulfur is denser than rhombic sulfur.

The normal boiling point of ethanol is 78^$\circ$C.If the vapor pressure of ethanol is 13.3 kPa at 34.9^$\circ$C,calculate the enthalpy of vaporization of ethanol.

The phase diagram for CO₂ is given below.The triple point is at 5.1 atm and 217 K. What happens if CO₂(l)at 30 atm and 450 K is released into a room at 1 atm and 298 K?

The vapor pressures of pure carbon disulfide and carbon tetrachloride are 360 and 99.8 Torr,respectively,at 296 K.What is the vapor pressure of a solution containing 50.0 g of each compound?

In a closed vessel containing water the pressure is 18 Torr.If more water is added to the vessel,the pressure

Calculate the concentration of argon in lake water at 20^$\circ$C.The partial pressure of argon is 0.0090 atm and Henrys constant is 0.0015 mol.L^-1.atm^-1.

Which of the following has the lowest freezing point?

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

Exam 10: Physical Equilibria

the triple point for water,4.6 Torr and 0.01 ∘\circ∘ C,varies depending on conditions?

Which of the following is likely to have the largest exothermic hydration enthalpy?

If you wanted to study solutions of different concentrations at different temperatures,would you use molarity or molality as your measure of concentration? Why?

For a one-component system,at the triple point

What is the molality of CrCl3 in a solution prepared by dissolving 75.2 g of chromium(III)chloride hexahydrate in 250.0 g of water.

Rank the following species in order of increasing vapor pressure at 25 ∘\circ∘ C. water,diethyl ether,ethanol,mercury

Of the following solutes,which is likely to be most soluble in water? A)Br2 B)carbon tetrachloride,CCl4 C)CS2 D)ethanol,CH3CH2OH

On what conditions does the location of the triple point for water-4.6 Torr and 0.01 ∘\circ∘ C -depend?

For CaCl2,the enthalpies of hydration and solution are -2337 and -81 kJ.mol-1,respectively,at 25 ∘\circ∘ C.Calculate the lattice enthalpy of calcium chloride.

Which liquid would you expect to be the more volatile,CH3CHO or CH3OCH3?

The phase diagram for a pure substance is shown below. What is the lowest temperature at which liquid can exist?

With which of the following solutes can water most readily hydrogen bond?

Consider the phase diagram for sulfur in the text on page 316.Monoclinic sulfur is denser than rhombic sulfur.

The normal boiling point of ethanol is 78 ∘\circ∘ C.If the vapor pressure of ethanol is 13.3 kPa at 34.9 ∘\circ∘ C,calculate the enthalpy of vaporization of ethanol.

The phase diagram for CO2 is given below.The triple point is at 5.1 atm and 217 K. What happens if CO2(l)at 30 atm and 450 K is released into a room at 1 atm and 298 K?

The vapor pressures of pure carbon disulfide and carbon tetrachloride are 360 and 99.8 Torr,respectively,at 296 K.What is the vapor pressure of a solution containing 50.0 g of each compound?

In a closed vessel containing water the pressure is 18 Torr.If more water is added to the vessel,the pressure

Calculate the concentration of argon in lake water at 20 ∘\circ∘ C.The partial pressure of argon is 0.0090 atm and Henrys constant is 0.0015 mol.L-1.atm-1.

Which of the following has the lowest freezing point?

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 triple point for water,4.6 Torr and 0.01^$\circ$C,varies depending on conditions?

What is the molality of CrCl₃ in a solution prepared by dissolving 75.2 g of chromium(III)chloride hexahydrate in 250.0 g of water.

Rank the following species in order of increasing vapor pressure at 25^$\circ$C. water,diethyl ether,ethanol,mercury

Of the following solutes,which is likely to be most soluble in water? A)Br₂ B)carbon tetrachloride,CCl₄ C)CS₂ D)ethanol,CH₃CH₂OH

On what conditions does the location of the triple point for water-4.6 Torr and 0.01^$\circ$C -depend?

For CaCl₂,the enthalpies of hydration and solution are -2337 and -81 kJ.mol^-1,respectively,at 25^$\circ$C.Calculate the lattice enthalpy of calcium chloride.

Which liquid would you expect to be the more volatile,CH₃CHO or CH₃OCH₃?

The normal boiling point of ethanol is 78^$\circ$C.If the vapor pressure of ethanol is 13.3 kPa at 34.9^$\circ$C,calculate the enthalpy of vaporization of ethanol.

The phase diagram for CO₂ is given below.The triple point is at 5.1 atm and 217 K. What happens if CO₂(l)at 30 atm and 450 K is released into a room at 1 atm and 298 K?

Calculate the concentration of argon in lake water at 20^$\circ$C.The partial pressure of argon is 0.0090 atm and Henrys constant is 0.0015 mol.L^-1.atm^-1.