Quiz 1 Boiling Points The boiling point of a liquid is defined as: The temperature at which the vapor pressure of a liquid exactly equals the pressure exerted on it. The temperature at which the vapor pressure of a liquid is less than the pressure exerted on it. The temperature at which the gases present in the liquid expand into large bubbles. The temperature of a liquid that exceeds the ambient temperature. Which of the following is not a true statement regarding boiling points? Requires about 1-2 mL of liquid. Is less affected by impurities. Is sensitive to ambient air pressure. Is not sensitive to ambient air pressure. What is superheating and how is it avoided? Heating a solution so fast that it ‘bumps’ out of a container; slow heating avoids this. Heating a solution above its boiling point without it boiling; adding a boiling stick or stone averts this. Heating a solution above its boiling point without it boiling; sealing off the boiling liquid from the atmosphere prevents this. Heating a solution so fast that it ‘bumps’ out of a container; sealing off the boiling liquid from the atmosphere prevents this. Liquids that have high boiling points have weak intermolecular bonding. True False The intermolecular bonding between hexane molecules is due to: Van der Waals forces. Dipole-dipole forces. Hydrogen bonding. Ionic bonding. Ethanol added to water forms a homogeneous mixture. This is due to: Van der Waals forces. Dipole-dipole forces. Hydrogen bonding. Ionic bonding. Molecules of acetone are attracted to each other because of: Van der Waals forces. Dipole-dipole forces. Hydrogen bonding. Ionic bonding. Which of the following is not a characteristic of an azeotrope? A mixture of liquids that has a constant boiling point. The boiling point of an azeotrope is always intermediate to the boiling points of its components. The composition of the liquid and its vapors does not change through the boiling process. The boiling point of an azeotrope may be higher or lower than that of any of components. Boiling points increase in a regular manner for a homologous series of molecules such as methanol, ethanol, propanol, butanol, etc. True False Which of the following 7-carbon chain molecules has the highest boiling point? Alkane Ketone Amine Alcohol

Quiz 1 Boiling Points The boiling point of a liquid is defined as: The temperature at which the vapor pressure of a liquid exactly equals the pressure exerted on it. The temperature at which the vapor pressure of a liquid is less than the pressure exerted on it. The temperature at which the gases present in the liquid expand into large bubbles. The temperature of a liquid that exceeds the ambient temperature. Which of the following is not a true statement regarding boiling points? Requires about 1-2 mL of liquid. Is less affected by impurities. Is sensitive to ambient air pressure. Is not sensitive to ambient air pressure. What is superheating and how is it avoided? Heating a solution so fast that it ‘bumps’ out of a container; slow heating avoids this. Heating a solution above its boiling point without it boiling; adding a boiling stick or stone averts this. Heating a solution above its boiling point without it boiling; sealing off the boiling liquid from the atmosphere prevents this. Heating a solution so fast that it ‘bumps’ out of a container; sealing off the boiling liquid from the atmosphere prevents this. Liquids that have high boiling points have weak intermolecular bonding. True False The intermolecular bonding between hexane molecules is due to: Van der Waals forces. Dipole-dipole forces. Hydrogen bonding. Ionic bonding. Ethanol added to water forms a homogeneous mixture. This is due to: Van der Waals forces. Dipole-dipole forces. Hydrogen bonding. Ionic bonding. Molecules of acetone are attracted to each other because of: Van der Waals forces. Dipole-dipole forces. Hydrogen bonding. Ionic bonding. Which of the following is not a characteristic of an azeotrope? A mixture of liquids that has a constant boiling point. The boiling point of an azeotrope is always intermediate to the boiling points of its components. The composition of the liquid and its vapors does not change through the boiling process. The boiling point of an azeotrope may be higher or lower than that of any of components. Boiling points increase in a regular manner for a homologous series of molecules such as methanol, ethanol, propanol, butanol, etc. True False Which of the following 7-carbon chain molecules has the highest boiling point? Alkane Ketone Amine Alcohol

Introduction to General, Organic and Biochemistry

11th Edition

ISBN:9781285869759

Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Chapter5: Gases, Liquids, And Solids

Section: Chapter Questions

Problem 5.69P

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Quiz 1 Boiling Points

The boiling point of a liquid is defined as:
1. The temperature at which the vapor pressure of a liquid exactly equals the pressure exerted on it.
2. The temperature at which the vapor pressure of a liquid is less than the pressure exerted on it.
3. The temperature at which the gases present in the liquid expand into large bubbles.
4. The temperature of a liquid that exceeds the ambient temperature.
Which of the following is not a true statement regarding boiling points?
1. Requires about 1-2 mL of liquid.
2. Is less affected by impurities.
3. Is sensitive to ambient air pressure.
4. Is not sensitive to ambient air pressure.
What is superheating and how is it avoided?
1. Heating a solution so fast that it ‘bumps’ out of a container; slow heating avoids this.
2. Heating a solution above its boiling point without it boiling; adding a boiling stick or stone averts this.
3. Heating a solution above its boiling point without it boiling; sealing off the boiling liquid from the atmosphere prevents this.
4. Heating a solution so fast that it ‘bumps’ out of a container; sealing off the boiling liquid from the atmosphere prevents this.
Liquids that have high boiling points have weak intermolecular bonding.
1. True
2. False
The intermolecular bonding between hexane molecules is due to:
1. Van der Waals forces.
2. Dipole-dipole forces.
3. Hydrogen bonding.
4. Ionic bonding.
Ethanol added to water forms a homogeneous mixture. This is due to:
1. Van der Waals forces.
2. Dipole-dipole forces.
3. Hydrogen bonding.
4. Ionic bonding.
Molecules of acetone are attracted to each other because of:
1. Van der Waals forces.
2. Dipole-dipole forces.
3. Hydrogen bonding.
4. Ionic bonding.

Which of the following is not a characteristic of an azeotrope?
1. A mixture of liquids that has a constant boiling point.
2. The boiling point of an azeotrope is always intermediate to the boiling points of its components.
3. The composition of the liquid and its vapors does not change through the boiling process.
4. The boiling point of an azeotrope may be higher or lower than that of any of components.
Boiling points increase in a regular manner for a homologous series of molecules such as methanol, ethanol, propanol, butanol, etc.
1. True
2. False

Which of the following 7-carbon chain molecules has the highest boiling point?
1. Alkane
2. Ketone
3. Amine
4. Alcohol

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