Volz purpose the purpose of this experiment is to explore the relationships between molecular size, composition, and intermolecular forces. We used london dispersion forces, dipoledipole forces, and hydrogen bonding. Intermolecular forces free download as powerpoint presentation. Intramolecular forces are responsible for many macroscopic properties such as electrical conductivity, hardness, and luster.
The decrease in mass is related to the strength of the intermolecular forces of attraction. Pdf on jan 1, 2016, kara paden and others published sweet chemistry. Intermolecular forces chemistry pdf book manual free. Lab 10 intermolecular forces lab 10 intermolecular. Bookmark file pdf intermolecular forces lab and answers intermolecular forces lab and answers this is likewise one of the factors by obtaining the soft documents of this intermolecular forces lab and answers by online. Intramolecular interactions occur when two atoms share electrons or donategain electrons tofrom another atom.
Intermolecular forces high school lab experiments pasco. Intermolecular forces design lab research question. Content objectives flagstaff unified school district. Intermolecular forces lab file new jersey center for. Describe how intermolecular forces influence the relative vapor pressure of a pure substance.
Understand the three main types of intermolecular forces be able to use the structure and polarity of a molecule to determine its predominant type of intermolecular forces understand the relationship between strength of intermolecular forces and the physical properties of solids and liquids background. The biggest difference between bonds and imfs is the imf are much weaker than the bonds. Read and learn for free about the following article. By accessing this content, you agree to not share or disseminate this content electronically or by any other means and to share your user information with flinn scientific. Intermolecular and interatomic forces intermolecular. If youre behind a web filter, please make sure that the domains. The imfa was administered outside of lecture in the laboratory setting which students take. Thus, intramolecular forces are much stronger than intermolecular forces. This simulation presents london dispersion forces as the weakest intermolecular force, followed by dipoledipole interactions, with hydrogen bonding being the strongest. The three main types of intermolecular forces are hydrogen bonding, dipoledipole forces, and london dispersion forces.
Feb 01, 2016 for the virtual lab, record in a procedure to determine. Oct 10, 2014 experiment 1 intermolecular forces of attraction 1. The aim was to teach the concept of intermolecular forces in a way that is. Be sure to emphasize that hydrogen bonding is an intermolecular force, not a bondan intramolecular force, like ionic, covalent, or metallic bonds. Examples of intermolecular forces are london dispersion forces ldf, dipoledipole forces ddf, and hydrogen bridging forces hbf. Lab report format lab report rubric equation editors for inserting pretty mathematic calculations in your lab reports. Intramolecular forces are forces acting on atoms within ionic crystals or molecules.
The intermolecular forces forces between molecules are weaker than intramolecular. Intermolecular forces intermolecular force chemical. Molecules in liquids are held to other molecules by intermolecular interactions, which are weaker than the intramolecular interactions that hold the atoms together within molecules and polyatomic ions. A polar molecule is one in which there is a difference in electronegativity between the atoms in the molecule, such that the shared electron pair. Link types of intermolecular forces to properties of a compound discuss the concept of like dissolves like in terms of polarity and intermolecular forces unit resources. All of the liquids are flammable no open flames in the lab. The student will also investigate physical properties of product substances including viscosity and cold flow by performing simple, selfdesigned tests.
Water had the strongest intermolecular forces and evaporated most slowly. Experiment 12z intermolecular forces and the liquidvapor. Your daily life period will be transform as soon as you complete looking over. F2 is a gas and i2 is a solid at room temperature, the difference in their phase is due to. What is chemically special about each type of intermolecular force. Terminologies intermolecular forces of attraction a force of attraction between molecules dipoledipole stronger than london dispersion. The content you are about to access is the property of and copywritten by flinn scientific.
Equation editors for inserting pretty mathematic calculations in your lab reports. Jul 03, 2016 on this page you can read or download grade 11 memorandum for physical sciences experiment on effect of intermolecular forces year 2016 in pdf format. Intramolecular and intermolecular forces article khan academy. It would take more energy to break the intermolecular forces in 1pentanol. Acetone evaporated first, followed by alcohol and water. Intermolecular forces of various substances lab report chemistry period 3 crater school of bis january 14, 2016 joshua l. For instance, melting a molecular solid involves increasing the temperature i. Content objectives swbat to rank the forms of intermolecular forces based on the strength of the attraction between molecules. Intermolecular forces intermolecular force chemical polarity. As you probably know, trying to format an equation in a document is almost impossible at least if you want it to look good. It really is writter in basic words instead of hard to understand.
Title intermolecular forces and states of matter interactive lecture demonstration. Eyeglasses are made from glass that is especially hard so it can be ground. Read online intermolecular forces chemistry book pdf free download link book now. There are different imfs for different atoms, which vary in their levels of strength. List one difference between an intermolecular force and a bond. Comparing the strength of intermolecular forces lab. Forces that hold atoms in a molecule are called intramolecular forces. Evaporation requires the breaking of all intermolecular forces. Intermolecular forces flinn lab answers this is likewise one of the factors by obtaining the soft documents of this. Consequently, there are dramatic changes in the degree of molecular motion present that accompany a phase change. A drop of each sample was placed on the table to determine which one evaporates first at room temperature. Intermolecular forces of attraction bautista, laureenkate capistrano, amiel espiel, kyle nicolas, ezber 2. The purpose of the experiment is to determine the strength of intermolecular forces within alcohol, acetone, and liquid water. This experiment was performed in order to acquaint students the importance of intermolecular forces and how they are applied to consumer products such as chapstick or lipstick.
Attractions between molecules are called intermolecular forces. Acetone has the weakest intermolecular forces, so it evaporated most quickly. We will look at the relationship between the forces and physical properties like boiling point, melting point, solubility vapor pressure and evaporation. Students will be working with the same group members for all three. Intermolecular forces, imfs, dispersion forces, dipoledipole, hydrogen bonding, viscosity, surface tension, solubilitythis set of 9 station activities will help your students construct explanations for out of the classroom experiences by using their knowledge of intermolecular forces.
Intermolecular forces 1 intermolecular forces imfs a the attraction between molecules that are responsible for a substances state of matter b the stronger the imf the higher the melting point of a solid, the higher the boiling point of the liquid, the stronger the surface tension, the stronger the cohesive and adhesive forces. You will also recall from the previous chapter, that we can describe molecules as being either polar or nonpolar. In the first part of this lab, you will build molecular models of maleic acid and fumaric acid to aid in the understanding of the inter and intramolecular forces present. You might not require more get older to spend to go to the books introduction as well as search for them. The forces that attract matter together into solids, liquids, or gases are called intermolecular forces. Oct 17, 2014 intermolecular forces of attraction lab report 1. Experiment 12z intermolecular forces and the liquid. This lab will explore changing masses during evaporation of organic liquids. Files available from the acs website may be downloaded for personal use only. The temperature where the substance becomes liquid and where it becomes solid. Pdf on jun 1, 2001, deborah leckband and others published intermolecular forces in biology find, read and cite all the research you need on. Intermolecular forces are forces that act between molecules. Swbat describe reallife implications to the different forms of intermolecular forces.
These are intermolecular or interatomic forces which are explicitly ignored in the. Use a stainless steel temperature sensor to determine the effects of molecular size and shape on the strength of intermolecular forces for different alcohols within. Dec 12, 2015 on this page you can read or download intermolecular interactions and geometry pre lab in pdf format. Lab report 1 intermolecular forces sample objective. I can classify the type of intermolecular forces hydrogen bonding, dipoledipole interaction, and london dispersion forces present in covalent molecules. Different solvents were used to test the intermolecular forces of the.
In this study, we focus on student understanding of intermolecular forces imfs, specifically hydrogen bonding, dipoledipole interactions, and london dispersion forces ldfs. Intramolecular and intermolecular forces article khan. The purpose of this lab is to investigate the relationship between intermolecular forces and the properties of liquids. In this weeks lab, you will observe how temperature effects the solubility of a solid by plotting a solubility curve. This occurs because molecules will have more kinetic energy at higher temperatures and this increase in energy will make it easier to break the intermolecular forces that hold the solid together. Experiment 10 5 november 2019 intermolecular forces. Dipole moment this is simply the degree to which a bond is polar.
Pyrex, a borosilicate glass lab ware is made when b2o3 is added to the silica melt. Inter molecular forces and liquids and solids free download as powerpoint presentation. Intermolecular forces and properties lundquist labs. Difference between intermolecular and intramolecular forces. Understand the use of graphical methods to extract thermodynamic information from experimental pressure and temperature data. Intermolecular forces and molecular models activity. While ionic and covalent bonds form between atoms, intermolecular forces or intermolecular attractions hold molecules. As we have previously noted, 2 the pathway that connects a molecular structure to the properties of a substance requires a long chain of inferences. Imfs are the forces that keep multiple molecules together. Chapter 12 intermolecular first page of chapter forces and.
What holds the molecules together the relative strength of the intermolecular force. This site is like a library, you could find million book here by using search. Editing equations on a computer can be a bit tricky to learn. Compare some physical properties of water with those of other liquids. On this page you can read or download grade 11 memorandum for physical sciences experiment on effect of intermolecular forces year 2016 in pdf format. The polar molecule induces a temporary dipole in the nonpolar molecule. Grade 11 memorandum for physical sciences experiment on. Intermolecular forces imf and boiling points introduction in this lab we will study the intermolecular forces responsible for the attractive forces between molecules. Given a compound or element that is a pure solid or liquid, identify the types of intermolecular attractive forces that occur between two or more molecules or atoms. Make a data table and graph in excel for the effect of intermolecular forces on pressure. Forces the chemical bonds within an individual molecule. These forces are responsible for the formation of chemical bonds. Chapter 11 intermolecular forces, liquids, and solids.
The forces responsible for keeping molecules or atoms intact as a solid or liquid are intermolecular attractive forces. List the 3 main types of intermolecular forces that were explored in todays lab. In part i, you will use the melting point apparatus to determine the melting point of each of the two substances labeled sample a and sample b. Liquids and solids vender singh geometry of crystals vidyanchal academy roorkee a phase is a homogeneous part of the system in contact with other parts of the system but separated from them by a welldefined boundary. Description this interactive lecture demonstration has the following learning goals students will be able to. Intermolecular forces are forces of attraction between molecules that. I can infer the relative strength of intermolecular forces based on observations of physical properties. Use your textbook andor the internet to learn about each type. Intermolecular forces of various substances lab report. Download intermolecular forces chemistry book pdf free download link or read online here in pdf. The strength of the intermolecular forces in isopropyl alcohol are in between water and acetone, but probably closer to acetone because the water took much longer to evaporate. Intermolecular and ionic forces gcc, 20 page 4 of 12 intermolecular and ionic forces compar ing imf using percent evaporation. If you dont see any interesting for you, use our search form on bottom v.
Pdf teaching intermolecular forces with love analogy. Larger molecules are more polarizable than smaller molecules since. Discovery intermolecular forces and physical properties. In this lab, students will use a stainless steel temperature sensor to determine the effects of molecular size and shape on the strength of intermolecular forces for different alcohols within the same homologous series and between isomeric pairs. Nord, eastern michigan university with large parts adapted from chemistry with computers by dan d. London dispersion forces 1pentanol should have larger intermolecular forces due to hbonding, meaning the molecules are more attracted to each other than in pentane. Divide students into groups of four and send each group to one of the prepared lab stations.
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