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    Lecture 7 Intermolecular Force Semester 1: 2014-2015 Instructor Teach Assistants Office Office hours 1 Huynh Kim Lam : Dr. Huỳnh Kim Lâm : Ms. Võ Diệu Ánh Dương Ms. Hồ Như Ngọc : Rm. A1.705 : 9:00-11:00 AM‚ Thursday (LKH) Chemistry for Engineers (CH011IU) - Lecture 7 - Semester 1: 2014-2015 huynhkimlam.iu@gmail.com / lamhuynh.info Molecular forces Intramolecular forces (bonding forces) – exist within each molecule – influence the chemical properties of the substance – are relatively strong

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    Intermolecular Forces

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    Summary: Experiment 9 is conducted to identify the importance of intermolecular forces and how they affect molecules. Intermolecular forces are forces between molecules that determine whether the molecule is a solid‚ liquid‚ or gas under standard conditions. In our lab‚ we measured the maximum and minimum temperature reached and time it took to reach it of alcohols and alkanes. In addition‚ we measured the vapor pressure of the liquid at different temperatures. Through Experiment 9‚ we concluded

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    Intermolecular Forces

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    Intermolecular forces exist between independent particles‚ such as atoms‚ ions‚ or molecules. They can be forces of either attraction or repulsion. The amount of charge‚ how it is distributed‚ and the length of time that a charge distribution exists can affect the strength of intermolecular forces. And despite having variable force strengths‚ all intermolecular forces are considered weak compared to chemical bonds‚ or intramolecular forces. Chemical bonds are not only stronger; they are also more

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    Intermolecular Forces

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    Intermolecular Forces Intermolecular forces are forces of attraction or repulsion which act between neighboring particles (atoms‚ molecules or ions). They are weak compared to the intramolecular forces‚ the forces which keep a molecule together. There are a few types of attractive intermolecular forces such as: Dipole-Dipole Forces Dipole–dipole interactions are electrostatic interactions of permanent dipoles in molecules. These interactions tend to align the molecules to increase the attraction

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    Intermolecular Forces

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    Oakland Schools Chemistry Resource Unit Intermolecular Forces  Brook R. Kirouac  David A. Consiglio‚ Jr.  Southfield‐Lathrup High School Southfield Public Schools    Bonding: Intermolecular Forces Content Statements: C2.2: Chemical Potential Energy Potential energy is stored whenever work must be done to change the distance between two objects. The attraction between the two objects may be gravitational‚ electrostatic‚ magnetic‚ or strong force. Chemical potential energy is the result of

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    Khanya Ramey Tuesday Nov. 24 Intermolecular Forces Intermolecular Forces Lab II. Goal: The central goal of this experiment is to depict the intermolecular forces of four different properties of solubility‚ evaporation‚ viscosity‚ and boiling point. The reason for achieving the goal is so we can further understand solubility‚ Evaporation‚ viscosity‚ and the boiling point of liquids. III. Experimental procedures In this Lab there were four different stations to experiment with‚ my partner

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    4.5 Intermolecular Forces

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    compounds depend on the intermolecular forces: -wetting (water absorbed by matter) -surface tension -capillary action -melting and boiling points -cohesion (attraction between like molecules) -adhesion (attraction between unlike molecules) -solubility -evaporation -intermolecular forces are much weaker than covalent bonds ex. if covalent bonds are assigned a strength of 100‚ then intermolecular forces are between 0.001 to 15. -there are 3 types of intermolecular forces: Dipole-Dipole‚

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    Intermolecular forces – design lab Research question: To calculate the solubility of equal masses nitrates of four di-positive ions (Lead Nitrate‚ Barium Nitrate‚ Copper Nitrate & Ferrous Nitrate of 0.5 M concentration) in an equal volume of water and relate this to the ionic radius of the element and the molar mass of the nitrate chosen and hence comment on the intermolecular forces in each of these nitrates. + write mass Justification of the research question: I was particularly interested

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    | Heptane | | C7H16 | 98.4 | 1-Hexanol | | C6H14O | 157 | The boiling point reflects the strength of forces between molecules. The more tightly bonded the molecules are‚ the more energy is required to convert them into gases. These forces are called intermolecular forces. There are 3 types‚ dispersion forces‚ dipole-dipole and hydrogen bonding. The influence of these attractive forces will depend on the functional groups present. For example heptane has boiling point of 98.4 degrees (1) and

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    Intermolecular Bonding

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    Van der Waal’s forces -- Electrons will not be evenly spread around an atom/molecule at any given time‚ meaning the molecule will have a slight +ve charge on one end‚ and a -ve at the other. this temporary state may cause attraction between two molecules‚ pulling them together (also known as London dispersion forces). The magnitude pof Van der Waals force depends on the relative molecular mass‚ high mass produces a larger force. Boiling points of the alkanes data and alkenes data These very

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