intermolecular forces of attraction lab

Hydrogen Bonds: A Special Type of Attraction Explore how polar molecules interact via hydrogen â¦ Laboratory Techniques Lab Report Option Two: Intermolecular Strength Hands-on Lab Instructions: For this investigative phenomenon, compare the intermolecular strengths of two substances by comparing their boiling points. The temporary dipole that results from the motion of the electrons in an atom can induce a dipole in an adjacent atom and give rise to the London dispersion force. These forces determine if a substance is a solid, liquid or gas at room temperature. 7B��B��=ty��zJ��j-\T6X�T��a�G��B��qX�E�T�eUA5)"��x�w�vH 5ޗ��,�XY�^�^��#�Ϲf�%��%��'��cQ/� ��x.&��_��ܵ�96f��U��܁��A��E�y��f��y��r'��Xƥ}lpz��{��ѷ� Include--substance name, minimum temperature, and time to get to minimum temperature. TERMINOLOGIES Intermolecular forces of attraction- •a force of attraction between molecules Dipole-dipole- •Stronger than London dispersion. GCC CHM 151LL: Intermolecular and Ionic Forces ©GCC, 2013 page 4 of 12 Intermolecular and Ionic Forces Compar ing IMF Using Percent Evaporation: This lab will explore changing masses during evaporation of organic liquids. CLASS SET - DO NOT WRITE ON! Chemistry CP H Period 29 March 2019 Intermolecular Forces of Attraction Lab Report As a person of integrity, this is my work _____ Purpose: The purpose of this experiment was to prove that there is an attraction by seeing how many drops of water and alcohol can fit onto a penny before gravity pulls the molecules apart and causes the water and alcohol to fall off the penny. Explain using the results of your experiment. London Dispersion. The most powerful intermolecular force influencing neutral (uncharged) molecules is the hydrogen bond.If we compare the boiling points of methane (CH 4) -161ºC, ammonia (NH 3) -33ºC, water (H 2 O) 100ºC and hydrogen fluoride (HF) 19ºC, we see a greater variation for these similar sized molecules than expected from the data presented above for polar compounds. d. â¦ Dipole-dipole attractions result from the electrostatic attraction of the partial negative end of one dipolar molecule for the partial positive end of another. Discussion Figure 1: Intermolecular Forces (IMF) Intramolecular Forces and Intermolecular Forces Intramolecular forces are the attractive forces forming ionic compounds (ionic bonds - gain and lose electrons to complete octets) or molecular compounds (covalent bonds - share electrons to complete octets). Intermolecular Forces of Attraction Introduction: The term “intermolecular forces of attraction” refers to why molecules are attracted to each other. by . Using the data you obtained in lab, answer the below questions. 7. ... Once a substance gains a certain amount of kinetic energy to overcome the molecules intermolecular attraction forces (hydrogen bonds, dipole-dipole forces, dispersion forces) the substance will escape into the gas phase, thus vaporizing. x�]ߓ�6r~�_��V��ß�I�|��D�ع�7��9�֖�,��v/��>_w�k��Õ7v�v@�Fw��? London forces increase with increasin… Note that we will use the popular phrase âintermolecular attractionâ to refer to attractive forces between â¦ Compare some physical properties of water with those of other liquids; and Associate the difference in the properties of the liquids to the types and strength of intermolecular forces existing between molecules. Intermolecular Forces of Attraction LAB. Compare some physical properties of water with those of other liquids; and Associate the difference in the properties of the liquids to the types and strength of intermolecular forces existing between molecules. %�� Intermolecular strength refers to the force of attraction between atoms or molecules within a substance. Activity C: Intermolecular forces Get the Gizmo ready: Select the INTERMOLECULAR FORCES tab. Each station not only offers a unique opportunity to test your students knowledge (offer an opinion, answer questions based on a video or reading, In the following description, the term particle will be used to refer to an atom, molecule, or ion. Each . The temperature where the substance becomes liquid and where it becomes solid. The different types of intermolecular attractions are: dispersion (London) forces, dipole-induced dipole interactions, ion-induced dipole interactions, dipole-dipole interactions, and hydrogen bonding. semester (Lab 1). The different types of intermolecular attractions are: dispersion (London) forces, dipole-induced dipole interactions, ion-induced dipole interactions, dipole-dipole interactions, and hydrogen bonding. I developed this lab to show this. Intramolecular forces are responsible for many macroscopic properties such as electrical conductivity, hardness, and luster. We compiled videos about Intermolecular Forces of Attraction. (ex: butane>1.5*C>35 sec, propane>0.3*C>15 sec). << /Length 5 0 R /Filter /FlateDecode >> Explain why. For the virtual lab, record in a Procedure to determine: The effect of varying intermolecular forces. Using the data you obtained in lab, answer the below questions. They differ from bonds in that they are not as strong and occur between two adjacent or neighboring molecules and not â¦ Which of the alkanes from the lab has the strongest intermolecular forces of attraction? These are hydrogen bonds and London dispersion force. They differ from bonds in that they are not as strong and occur between two adjacent or neighboring molecules and not within the molecule itself. These forces influence the properties of the substance, causing substances with strong forces BETWEEN molecules to be solids at room temperature and substances with weak forces BETWEEN molecules to be gases. Other properties of matter such as boiling point, Explain the difference in the ΔT values based on their intermolecular forces. This content is neither created nor endorsed by Google. Evaporation occurs when the probe is removed from the liquid's container. Hydrogen Bonding. They can be forces of either attraction or repulsion. Viscosity increases noticeably from methanol through 1-butanol. Intermolecular Forces of Attraction (IMFA) Intermolecular Forces of Attraction are forces of attraction between unlike charges, partially positive and negative dipoles, that occur between two molecules.. It results when cohesive forces, the intermolecular forces in the liquid, are weaker than adhesive forces, the attraction between a liquid and the surface of the capillary. Email address * Your email. Which three forces affect the strength of intermolecular attractions? stream Make a data table and graph in excel for the effect of intermolecular forces on pressure. The decrease in mass is related to the strength of the intermolecular forces of attraction. Which of the following would be the correct curve for "octanol" compared to what you saw today? b. If the intramolecular force is greater, it will take a long time for the substance to melt. Which of the ALCOHOLS had the STRONGEST intermolecular forces of attraction? Only alter the intermolecular forces variable. Explain your answer to the above question. Name * Your answer. Factors Affecting London Dispersion Attractions Explore how differences in molecular size and shape affect the strength of London Dispersion attractions. Two liquids, an alkane and an alcohol, have similar molecular weights but significantly different ΔT values. Make a data table and graph in excel for the effect of intermolecular forces on pressure. Materials and Equipment The van der Waals forces encompass intermolecular forces as well as some intramolecular forces including Keesom interaction, the Debye force, and the London dispersion force. The magnitude of a temperature decrease is. %PDF-1.3 Types of Intermolecular Forces •van der Waals forces –between atoms and molecules of pure substances –Dipole-dipole interactions –attractive forces between polar molecules –Hydrogen bonding –attractive force in polar molecules containing a H atom bonded to a small, highly electronegative element (N, O and F) In this experiment, Temperature Probes are placed in various liquids. c. If you have two substances with molecules that are similar size and shape, but A experiences London dispersion forces and B experiences dipole-dipole attraction, which one would you expect to have a … Identify the STRONGEST intermolecular force present in "methanol", Identify the STRONGEST intermolecular force present in "ethanol", Identify the STRONGEST intermolecular force present in "1-propanol", Identify the STRONGEST intermolecular force present in "1-butanol", Identify the STRONGEST intermolecular force present in "n-pentane", Identify the STRONGEST intermolecular force present in "n-hexane", Enter the data for all six substances. 3. As was the case for gaseous substances, the kinetic molecular theory may be used to explain the behavior of solids and liquids. The preview shows you one of the 4 different macroscopic properties that are analyzed in this lab. Sign in Register; Hide. b. The attractions between molecules are called intermolecular forces. Identify the STRONGEST intermolecular force present in "methanol" * 1 point. Intermolecular Forces of Attraction LAB. intermolecular forces evaporation and intermolecular attractions hypothesis: the two types of alkanes (pentane and hexane) will evaporate faster than the two. These intermolecular forces, or IMFs, affect many physical properties including boiling point, solubility, viscosity, and surface tension. Describe the types of intermolecular forces possible between atoms or molecules in condensed phases (dispersion forces, dipole-dipole attractions, and hydrogen bonding) ... the larger … ‘ln this relate the tem er m 11 Y temperature changes caused by the evaporation of several liquids and p a re cl‘lanr‘ées to the strength of intermolecular forces of attraction. INTERMOLECULAR FORCES OF ATTRACTION Bautista, LaureenKate Capistrano, Amiel Espiel, Kyle Nicolas, Ezber 2. Hydrogen Bonding. The force of attraction, based on Coulomb’s Law (F=k*q1*q2/r^2), will be the independent variable and the melting time would be the dependent variable. Intermolecular forces (IMF) (or secondary forces) are the forces which mediate interaction between molecules, including forces of attraction or repulsion which act between atoms and other types of neighboring particles, e.g. The intermolecular forces are basically the force between molecules. 1) Surface Tension. Thus, the water molecule exhibits two types of intermolecular forces of attraction. The formula for octanol is given below. Email address * Your email. m�ؿ?��OW��Ϳ�=��m�~�=z�a`�=:��oo�B6�B6��X�m��+�q�^��ݡLC� e�*��*�:��m��=t��X-q�}��v�ޘ՚�ڟb,o�ɬ��p��y�oJ"�k0�`��8k h߃I�.a��3[��隺�{Y��:N��WV�mӿne׾�j½fU�Y�b��ƃ�Z �!��aV�$�lx9��l�>��¿�)��j INTERMOLECULAR FORCES OF ATTRACTION Bautista, LaureenKate Capistrano, Amiel Espiel, Kyle Nicolas, Ezber 2. In this type of interaction, a non-polar molecule is polarized by an … atoms or ions.Intermolecular forces are weak relative to intramolecular forces – the forces which hold a molecule together. �֕�{z{UH��V��֎M#f�r!��o%�. As was the case for gaseous substances, the kinetic molecular theory may be used to explain the behavior of solids and liquids. Intermolecular forces of attraction (lab report) 1. The boiling temperatures of methanol, ethanol, 1-propanol, and 1-butanol are 65¡C, 78¡C, 97¡C, and 117¡C, respectively. The temperature where the substance becomes liquid and where it becomes solid. Consider the strength of the forces TERMINOLOGIES Intermolecular forces of attraction- â¢a force of attraction between molecules Dipole-dipole- â¢Stronger â¦ If the intramolecular force is … If the intramolecular force is weak, it will take less time for the substance to melt. Considered weak compared to what you saw today concrete lab to show the students the effect... 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