Homework Answers
Question 1.
Methanol: Molar mass = 32, the strongest type of intermolecular force = Hydrogen bonding, Molecular structure = CH3-OH
Ethanol: Molar mass = 46, the strongest type of intermolecular force = Hydrogen bonding, Molecular structure = CH3-CH2-OH
1-Propanol: Molar mass = 60, the strongest type of intermolecular force = Hydrogen bonding, Molecular structure = CH3-CH2-CH2-OH
1-Butanol: Molar mass = 74, the strongest type of intermolecular force = Hydrogen bonding, Molecular structure = CH3-CH2-CH2-CH2-OH
n-Hexane: Molar mass = 86, the strongest type of intermolecular force = London dispersion forces, Molecular structure = CH3-CH2-CH2-CH2-CH2-CH3
n-Heptane: Molar mass = 100, the strongest type of intermolecular force = London dispersion forces, Molecular structure = CH3-CH2-CH2-CH2-CH2-CH2-CH3
n-Octane: Molar mass = 114, the strongest type of intermolecular force = London dispersion forces, Molecular structure = CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH3
Acetone: Molar mass = 58, the strongest type of intermolecular force = dipole-dipole interactions, Molecular structure = CH3-CO-CH3
2-Propanol: Molar mass = 60, the strongest type of intermolecular force = Hydrogen bonding, Molecular structure = CH3-CH(OH)-CH3
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Liquid Molar Mass (g/mol) Polarity (P, NP) Strongest type of Intermolecular Force Molecular structure Methanol Po...
In class work. Help? Date Lab Partner EXPERIMENT 12 Intermolecular Forces substance | tmax (°C) |...
In class work. Help?
Date Lab Partner EXPERIMENT 12 Intermolecular Forces substance | tmax (°C) | tmin (°C) ?T (tmax-tmin) Ethanol l-propanol Predicted Explanation I-butanol npentane Methanol n-hexane The molecular weights for n-pentane and 1-butanol are similar but the liquids have significantly different ?? values. Explain why the values are different I. 2. Which of the alcohols studied has the strongest intermolecular forces of attraction? Explain
7). a). Is the acetone molecule non-polar or polar? Circle. Non-polar Polar b). Sketch pictures of...
7). a). Is the acetone molecule non-polar or polar? Circle. Non-polar Polar b). Sketch pictures of the intermolecular forces that would occur between the molecules of acetone and the molecules of 2- propanone if you have a mixture of the two liquids. What would be the main type of IMF that is responsible for the attraction? (Give a name for the IMF). c). The pentane molecule and the 2-pentanone molecule both have five carbon atoms on their structures. Why 2-pentanone...
INTERMOLECULAR FORCES INTRODUCTION LEARNING OBJECTIVES To relate the effecet of intermolecular fo...
INTERMOLECULAR FORCES INTRODUCTION LEARNING OBJECTIVES To relate the effecet of intermolecular forces on relative melting points and vapour pressures of some organic substances THEORY Weak attractive forces that occur between individual molecules in substances are called intermolecular forces. These include London dispersion forces, dipole-dipole forces and hydrogen-bonding forces. Collectively, the three types of intermolecular forces are referred to as Van der Waals forces. These attractive forces are much weaker than the chemical bonds between atoms in a molecule. Note that...
18) What is the strongest intermolecular force is the strongest intermolecular force in a liquid containing...
18) What is the strongest intermolecular force is the strongest intermolecular force in a liquid containing molecules with H-O bonds? A) covalent bonds B) dipole forces C) dispersion forces D) hydrogen bonds E) none of the above Section: 11.2 The Intermolecular Bond Concept 19) Consider the following liquids with similar molar masses. Predict which has the strongest intermolecular attraction based only on boiling point data. A) butyl alcohol (Bp @ 760 mm Hg = 117 °C) B) ethyl ether (Bp...
Based on the previous question and not have to predict the exact value; simply rank the...
Based on the previous question and not have to predict the exact value; simply rank the liquids from greatest to least Al (Greatest AT = 1 and Lowest AT = 4) Substance Predicted AT Explanation (Why?) 1-butanol methanol n-pentane n-hexane Based on the previous question and table, Predict AT for the following liquids. You do not have to predict the exact value; simply rank the liquids from greatest to least AT (Greatest AT = 1 and Lowest AT = 4)...
2. Identify the strongest type of intermolecular forces in acetone, ethanol, water and hexane. (Structures listed...
2. Identify the strongest type of intermolecular forces in acetone, ethanol, water and hexane. (Structures listed on page 15.) Experiment 2 Intermolecular Forces There are three general types of intermolecular forces. All substances exhibit London Dispersion Forces (LDF), and they are generally the weakest of the three types. These London forces are due to the attractions between small, temporary dipoles that arise from the constant, random movement of the electrons in a substance. As molar mass increases, the size of...
i neds help with all the question 1. Indicate which is the strongest intermolecular force between...
i neds help with all the question
1. Indicate which is the strongest intermolecular force between each of the two molecules below: a. H2S and H2O b. C4H10 (butane) and (CH3)2CO (acetone) 2. Considering properties of liquids: a. Surface tension is proportional to the magnitude of intermolecular forces and/or attractive forces among the molecules in the liquid. With this perspective in mind, which in the following pair of liquids would have the highest surface tension: H2O or CHCl3 (chloroform) b....
rank the molecules in the table from weakest to strongest intermolecular forces and briefly justify the...
rank the molecules in the table from weakest to strongest
intermolecular forces and briefly justify the ranking.
temperature 310 20 time (s) 40 Fig. 10.1. Sample data for an evaporative cooling process. Before You Come to Lab Based on what you know about the relationship between the structure of a molecule and the strength of its intermolecular forces, rank the molecules in the table below in order from the weakest to the strongest intermolecular forces and briefly justify your ranking...
3. Draw the Lewis structure for the sulfate ion (1pt] a. What is the molecular geometry...
3. Draw the Lewis structure for the sulfate ion (1pt] a. What is the molecular geometry of this molecule? (0.5pt] b. What is the chemical formula for ammonium sulfate? [1pt] C. What is the molar mass of ammonium sulfate? (1pt] 4. Draw one valid Lewis structure for dinitrogen monoxide (HINT: N is the center atom]. [1pt] a. What is the molecular geometry of this molecule? (0.5pt] b. Is this molecule polar or non-polar? (0.5pt] C. Identify all the intermolecular forces...
*Explanations should be brief. Draw a box around each final answer, if applicable.* 1. Consider intermolecular...
*Explanations should be brief. Draw a box around each final answer, if applicable.* 1. Consider intermolecular forces and kinetic energies with respect to a solid and a liquid. Explain why molecules in a liquid are free to move past each other, while molecules in a solid are held in fixed positions. 2. Use your knowledge of intermolecular forces to provide an explanation for why the boiling point of 2-hexanol is higher than the boiling point of 2,3-dimethyl-2-butanol. Be sure to...
In class work. Help?
Date Lab Partner EXPERIMENT 12 Intermolecular Forces substance | tmax (°C) | tmin (°C) ?T (tmax-tmin) Ethanol l-propanol Predicted Explanation I-butanol npentane Methanol n-hexane The molecular weights for n-pentane and 1-butanol are similar but the liquids have significantly different ?? values. Explain why the values are different I. 2. Which of the alcohols studied has the strongest intermolecular forces of attraction? Explain
7). a). Is the acetone molecule non-polar or polar? Circle. Non-polar Polar b). Sketch pictures of the intermolecular forces that would occur between the molecules of acetone and the molecules of 2- propanone if you have a mixture of the two liquids. What would be the main type of IMF that is responsible for the attraction? (Give a name for the IMF). c). The pentane molecule and the 2-pentanone molecule both have five carbon atoms on their structures. Why 2-pentanone...
INTERMOLECULAR FORCES INTRODUCTION LEARNING OBJECTIVES To relate the effecet of intermolecular forces on relative melting points and vapour pressures of some organic substances THEORY Weak attractive forces that occur between individual molecules in substances are called intermolecular forces. These include London dispersion forces, dipole-dipole forces and hydrogen-bonding forces. Collectively, the three types of intermolecular forces are referred to as Van der Waals forces. These attractive forces are much weaker than the chemical bonds between atoms in a molecule. Note that...
18) What is the strongest intermolecular force is the strongest intermolecular force in a liquid containing molecules with H-O bonds? A) covalent bonds B) dipole forces C) dispersion forces D) hydrogen bonds E) none of the above Section: 11.2 The Intermolecular Bond Concept 19) Consider the following liquids with similar molar masses. Predict which has the strongest intermolecular attraction based only on boiling point data. A) butyl alcohol (Bp @ 760 mm Hg = 117 °C) B) ethyl ether (Bp...
Based on the previous question and not have to predict the exact value; simply rank the liquids from greatest to least Al (Greatest AT = 1 and Lowest AT = 4) Substance Predicted AT Explanation (Why?) 1-butanol methanol n-pentane n-hexane Based on the previous question and table, Predict AT for the following liquids. You do not have to predict the exact value; simply rank the liquids from greatest to least AT (Greatest AT = 1 and Lowest AT = 4)...
2. Identify the strongest type of intermolecular forces in acetone, ethanol, water and hexane. (Structures listed on page 15.) Experiment 2 Intermolecular Forces There are three general types of intermolecular forces. All substances exhibit London Dispersion Forces (LDF), and they are generally the weakest of the three types. These London forces are due to the attractions between small, temporary dipoles that arise from the constant, random movement of the electrons in a substance. As molar mass increases, the size of...
i neds help with all the question
1. Indicate which is the strongest intermolecular force between each of the two molecules below: a. H2S and H2O b. C4H10 (butane) and (CH3)2CO (acetone) 2. Considering properties of liquids: a. Surface tension is proportional to the magnitude of intermolecular forces and/or attractive forces among the molecules in the liquid. With this perspective in mind, which in the following pair of liquids would have the highest surface tension: H2O or CHCl3 (chloroform) b....
rank the molecules in the table from weakest to strongest
intermolecular forces and briefly justify the ranking.
temperature 310 20 time (s) 40 Fig. 10.1. Sample data for an evaporative cooling process. Before You Come to Lab Based on what you know about the relationship between the structure of a molecule and the strength of its intermolecular forces, rank the molecules in the table below in order from the weakest to the strongest intermolecular forces and briefly justify your ranking...
3. Draw the Lewis structure for the sulfate ion (1pt] a. What is the molecular geometry of this molecule? (0.5pt] b. What is the chemical formula for ammonium sulfate? [1pt] C. What is the molar mass of ammonium sulfate? (1pt] 4. Draw one valid Lewis structure for dinitrogen monoxide (HINT: N is the center atom]. [1pt] a. What is the molecular geometry of this molecule? (0.5pt] b. Is this molecule polar or non-polar? (0.5pt] C. Identify all the intermolecular forces...
*Explanations should be brief. Draw a box around each final answer, if applicable.* 1. Consider intermolecular forces and kinetic energies with respect to a solid and a liquid. Explain why molecules in a liquid are free to move past each other, while molecules in a solid are held in fixed positions. 2. Use your knowledge of intermolecular forces to provide an explanation for why the boiling point of 2-hexanol is higher than the boiling point of 2,3-dimethyl-2-butanol. Be sure to...
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