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Multiple Choice Identify the choice that best completes the statement or answers the question 34.6C 78.3 C 100°C S0...
Which of the following compounds has the highest boiling point? 34.6°C 78.3°C 100°C 800 760 Normal...
Which of the following compounds has the highest boiling point? 34.6°C 78.3°C 100°C 800 760 Normal boiling point 600 Vapor pressure (tor) Diethyl ether Water 400 Ethyl alcohol (ethanol) 200 Ethylene glycol 0 20 80 100 40 60 Temperature (°C) Select one: a. NH3 O b. H₂S о с. НСІ O d. H₂O According to the MO theory, which of the following molecules should not exist? Select one: a. Hez b. Hez c. H2 d. All of the above
figure 1 Figure 2 Liquid ethanol mm P increasing P = equilibrium vapor pressure P=0 Add...
figure 1
Figure 2
Liquid ethanol mm P increasing P = equilibrium vapor pressure P=0 Add System comes to equilibrium ethanol Evacuated flask, pressure zero Molecules begin to vaporize, pressure increases Molecules leave and enter liquid at equal rates, pressure reaches steady-state value 34.6 °C 78.3°C 100 °C Normal boiling point Diethyl ether Vapor pressure (torr) Ethyl alcohol (ethanol) Water Ethylene glycol 100 20 40 60 80 Temperature (°C) Copyright 2009 Pearson Prentice Hall,Inc. Click on: (Figure 2) and study...
en e Text 34.6°C 78.3°C Area 100°C ent Sharing Normal boiling point Diethyl ether tings Vapor...
en e Text 34.6°C 78.3°C Area 100°C ent Sharing Normal boiling point Diethyl ether tings Vapor pressure (tore) Ethyl alcohol (ethanol) Dols Ethylene glycol 20 80 100 40 60 Temperature (°C) Based on the figure above, the boiling point of water under an external pressure of 0.0658 atm is °C. O O O O O
Based on the figure above, the boiling point of diethyl ether under an external pressure of...
Based on the figure above, the boiling point of diethyl ether
under an external pressure of 0.590 atm is ________°C.
a 20
b 0
c 60
d 30
34.6°C 78.3 °C 100 °C 800 760 Normal boiling point 600 Vapor pressure (tor) Diethyl ether Water 400 Ethyl alcohol (ethanol) 200 Ethylene glycol 0 0 20 80 100 40 60 Temperature (°C)
A) TRUE B) FALSE U. Heats of vaporization are greater than heats of fusion 800 34.6°C...
A) TRUE B) FALSE U. Heats of vaporization are greater than heats of fusion 800 34.6°C 760 783C 10 Normal boiling 600 Diethyl/ point Ethyl alcohol (ethanol) Water Ethylene glycol 20 40 60 80 100 Temperature (00 11. Based on the figure above, the boiling point of diethyl ether under an external pressure of 0.605 atm is A40 B) 10 C) 30 D) 20 E) 0 12. What is the predominant intermolecular foree in HCN? A) dipole-dipole attraction B) ion-dipole...
Question 16 (1 point) Which substance below has the weakest intermolecular forces? BY2, AHvap=29.2 kJ/mol A2X,...
Question 16 (1 point) Which substance below has the weakest intermolecular forces? BY2, AHvap=29.2 kJ/mol A2X, AHvap= 41.2 kJ/mol C3X2, AHvap= 33.2 kJ/mol DX2, AHvap= 25.2 kJ/mol EY3, AHvap= 20.5 kJ/mol Question 3 (1 point) The spheres below represent atoms of Si, Ge,C, and Sn (not necessarily in that order). r=110 pm - 140 pm T-75 pm (a) r=120 pm (c) Which one of these spheres represents an atom of Si? sphere (c) sphere (b) sphere (a) sphere (d) KYC...
Question 3 (4 points) The vapor pressure of a liquid is dependent on: the temperature of...
Question 3 (4 points) The vapor pressure of a liquid is dependent on: the temperature of the liquid and intermolecular forces of attraction in the liquid the temperature of the liquid and the surface area of the liquid only on the surface area of the liquid only the temperature of the liquid O only the forces of intermolecular attraction in the liquid Question 4 (4 points) If the atmospheric pressure over a sample of liquid is increased, the boiling point...
14) The vapor pressure of ethylene glycol at 100 °C and its normal boiling point (to...
14) The vapor pressure of ethylene glycol at 100 °C and its normal boiling point (to a good approximation) are: A) 150 torr and 130 C, respectively B) 65 torr and 210 C, respectively C) 200 torr and 300 C, respectively D) Otorr and 700 C, respectively 15) The higher normal boiling point of ethylene glycol relative to the other solvents can be explained mainly based on: A) Higher dispersion forces B) Low dispersion forces C) Extensive hydrogen bonding D)...
Identify the letter of the choice that best completes the statement or answers the question.
Identify the letter of the choice that best completes the statement or answers the question.1. Nonpolar molecules havea. no negative or positive poles:b. both negative and positive poles.c. only a negative pole.d. only a positive pole.2. A molecule that has a partial positive charge on one side and a partial negative charge on the other side is called aa. nonpolar molecule.b. polar molecule,c. charged molecule.3. Water is important to life because itb. is found inside cells.c. influences the shape of...
Multiple Choice Identify the choice that best completes the statement or answers the question. (20 pts,...
Multiple Choice Identify the choice that best completes the statement or answers the question. (20 pts, 4 pts cach) 1. Which of the following compounds, when placed in water, do you expect to have the least amount of hydrate present at equilibrium? O do CH3 HH CH e. All these compounds will have about the same amounts of hydrate at equilibrium. H CH 0 CH CH3 2. For which of the following compounds do you expect the aldehyde to be...
Which of the following compounds has the highest boiling point? 34.6°C 78.3°C 100°C 800 760 Normal boiling point 600 Vapor pressure (tor) Diethyl ether Water 400 Ethyl alcohol (ethanol) 200 Ethylene glycol 0 20 80 100 40 60 Temperature (°C) Select one: a. NH3 O b. H₂S о с. НСІ O d. H₂O According to the MO theory, which of the following molecules should not exist? Select one: a. Hez b. Hez c. H2 d. All of the above
figure 1
Figure 2
Liquid ethanol mm P increasing P = equilibrium vapor pressure P=0 Add System comes to equilibrium ethanol Evacuated flask, pressure zero Molecules begin to vaporize, pressure increases Molecules leave and enter liquid at equal rates, pressure reaches steady-state value 34.6 °C 78.3°C 100 °C Normal boiling point Diethyl ether Vapor pressure (torr) Ethyl alcohol (ethanol) Water Ethylene glycol 100 20 40 60 80 Temperature (°C) Copyright 2009 Pearson Prentice Hall,Inc. Click on: (Figure 2) and study...
en e Text 34.6°C 78.3°C Area 100°C ent Sharing Normal boiling point Diethyl ether tings Vapor pressure (tore) Ethyl alcohol (ethanol) Dols Ethylene glycol 20 80 100 40 60 Temperature (°C) Based on the figure above, the boiling point of water under an external pressure of 0.0658 atm is °C. O O O O O
Based on the figure above, the boiling point of diethyl ether
under an external pressure of 0.590 atm is ________°C.
a 20
b 0
c 60
d 30
34.6°C 78.3 °C 100 °C 800 760 Normal boiling point 600 Vapor pressure (tor) Diethyl ether Water 400 Ethyl alcohol (ethanol) 200 Ethylene glycol 0 0 20 80 100 40 60 Temperature (°C)
A) TRUE B) FALSE U. Heats of vaporization are greater than heats of fusion 800 34.6°C 760 783C 10 Normal boiling 600 Diethyl/ point Ethyl alcohol (ethanol) Water Ethylene glycol 20 40 60 80 100 Temperature (00 11. Based on the figure above, the boiling point of diethyl ether under an external pressure of 0.605 atm is A40 B) 10 C) 30 D) 20 E) 0 12. What is the predominant intermolecular foree in HCN? A) dipole-dipole attraction B) ion-dipole...
Question 16 (1 point) Which substance below has the weakest intermolecular forces? BY2, AHvap=29.2 kJ/mol A2X, AHvap= 41.2 kJ/mol C3X2, AHvap= 33.2 kJ/mol DX2, AHvap= 25.2 kJ/mol EY3, AHvap= 20.5 kJ/mol Question 3 (1 point) The spheres below represent atoms of Si, Ge,C, and Sn (not necessarily in that order). r=110 pm - 140 pm T-75 pm (a) r=120 pm (c) Which one of these spheres represents an atom of Si? sphere (c) sphere (b) sphere (a) sphere (d) KYC...
Question 3 (4 points) The vapor pressure of a liquid is dependent on: the temperature of the liquid and intermolecular forces of attraction in the liquid the temperature of the liquid and the surface area of the liquid only on the surface area of the liquid only the temperature of the liquid O only the forces of intermolecular attraction in the liquid Question 4 (4 points) If the atmospheric pressure over a sample of liquid is increased, the boiling point...
14) The vapor pressure of ethylene glycol at 100 °C and its normal boiling point (to a good approximation) are: A) 150 torr and 130 C, respectively B) 65 torr and 210 C, respectively C) 200 torr and 300 C, respectively D) Otorr and 700 C, respectively 15) The higher normal boiling point of ethylene glycol relative to the other solvents can be explained mainly based on: A) Higher dispersion forces B) Low dispersion forces C) Extensive hydrogen bonding D)...
Multiple Choice Identify the choice that best completes the statement or answers the question. (20 pts, 4 pts cach) 1. Which of the following compounds, when placed in water, do you expect to have the least amount of hydrate present at equilibrium? O do CH3 HH CH e. All these compounds will have about the same amounts of hydrate at equilibrium. H CH 0 CH CH3 2. For which of the following compounds do you expect the aldehyde to be...
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