13.3: Vapor Pressure & Phase Diagrams Chapter 13 Dr. Robert E. Belford

Question 1
 Which set of curves would represent the effect of increasing temperature on the vapor pressure of a liquid? (A)  A & B (B)  C & D (C)  All of them (D)  None of them

Question 2
 The normal boiling point is defined as: (A)  100 deg C (B)  The boiling pt. at 1 atm (C)  The boiling pt. on planet earth (D)  none of the above

Question 3
 The normal boiling point of diethyl ether is 34.6oC and of water is 100oC. Which has the higher vapor pressure at 20oC? (A)  water (B)  diethyl ether (C)  they are the same (D)  it depends on your elevation

Question 4
 If one of the compounds in question 1 is diethyl ether and the other is water, curve___is diethyl ether and curve___is water. (A)  A,B (B)  B,A (C)  C,D (D)  D,C

Question 5
 The point X represents: (A)  the critical point, where a solid, liquid and vapor can coexist (B)  The critical point where the two fluid phases can not be distinguished (C)  The triple point, where a solid, liquid and vapor can coexist (D)  The triple point, where the fluid phases can not be separated

Question 6
 The point Y in the figure of question 6 represents (A)  the critical point, where a solid, liquid and vapor can coexist (B)  The critical point where the two fluid phases can not be distinguished (C)  The triple point, where a solid, liquid and vapor can coexist (D)  The triple point, where the fluid phases can not be separated

Question 7
 Region A of the figure in question 5 represents (A)  solid (B)  liquid (C)  vapor (D)  none of the above

Question 8
 Region B of the figure in question 5 represents (A)  solid (B)  liquid (C)  vapor (D)  none of the above

Question 9
 Region C of the figure in question 5 represents (A)  solid (B)  liquid (C)  vapor (D)  none of the above

Question 10
 The negative slope between regions A and B of the figure in question 5 indicates: (A)  the solid is more dense than the liquid (B)  the liquid is more dense the the solid (C)  the vapor is more dense than the liquid (D)  the vapor is more dense than the solid

Question 11
 The figure in quesion 5 is consitent with a phase diagram for which compound (A)  carbon dioxide (B)  sodium (C)  water (D)  carbon dioxide and water

Question 12
 The compound in question 5 sublimes at pressures: (A)  greater than deg O C (B)  Pressures greater than 1.0 atm (C)  pressures between 0.0060 and 1.00 atm (D)  pressures less than 0.0060 atm

Question 13
 Consider a 1 atm isobar for the compound in question 5. Moving left to right in region A represents (A)  freezing (B)  melting (C)  heating supercooled ice (D)  none of the above

Question 14
 Consider a 1 atm isobar for the compound in question 5. Adding heat to a substance in region A causes it to warm, what happens when you reach the line between region A & B? (A)  it boils (B)  it melts (C)  it freezes (D)  it continues to warm up

Question 15
 Consider a 1 atm isobar for the compound in question 5. Moving left to right in region B represents (A)  melting (B)  boiling (C)  heating liquid water (D)  cooling liquid water

Question 16
 Consider a 1 atm isobar for the compound in question 5. Adding heat to a substance in region B causes it to warm, what happens when you reach the line between region B & C? (A)  it continues to warm (B)  it condenses (C)  it boils (D)  none of the above