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Safari File Edit View History Bookmarks window Help 42% 0, Tue 8:50 PM E blackboard.njcu.edu https://blackboard.njcu.eduybbcswebdav/pid-594931-dt-content-rid-4440041 1Wcourses/1244CHEM106Spr2018/ Chemistry question | Chegg.com Model 3: Intermolecular forces are weaker than covalent bonds The types of bonds you ldentifed In CTO 16 can exhlbit an intermolecular hydrogen bonding. A "hydrogen bond" is simply a particularly strong attraction between the bonded hydrogen atom and a lone pair on another atom. The intermolecular forces that attract molecules to each other are much weaker than the bonds that hold molecules together. Fore of O-H bonds in H20 molecules, but only 44 k/mol are needed to separate one mole of water molecules in liquid water xample, 463 kmol are required to break one mole Types of intermolecular forces: interaction between a hydrogen atom attached to an atom of fluorine, oxygen, or nitrogen on one molecule anda Hydrogen bonding: An electronegative is the strongest Intermolecular force. e paionogr sflectrons on a tuorne, oxygen, or nitrogen on another molecule. This Dipole-dipole forces: Often polar covalent bonds create polar molecules which have a posltive end and a negatlve end. The positlvely polarized ends of molecules will attract the negatively polarized ends of other molecules London dispersion forces: At any given instant, electrons may be nearer to one end of a molecule or the other. When they are nearer to one end, the nearby molecules, causing the ends of the molecules nearby to have a partial positive charge, and creating a momentary attractive force. This Is the weakest force and is present in all molecules. In large molecules, this force can be quite significant Critical Thinking Questions: 17.What is the difference between Intramolecular bonds and intermolecular forces? 18. Rank these intermolecular forces in terms of their typical relative strengths: dipole dipole, hydrogen bonding, London forces. Compare with your team. Intermolecular forces, write a consensus explanation of he general trend that you described in CTQ 13. 20.Suppose that we conslder anything over about 1 aram.per 100 ml water to be "soluble. What is the heaviest alcohol in Model 2 that is water soluble? b. a. How many carbons are In this alcohol? what is the heaviest amine in Model 2 that is water soluble? c. d. How many carbons are in this amine? 21. Considering your answers to CTQ 20, the presence of is sufficient to dissolve a molecule containing about how many nonpolar carbons? Circle one of the following choices: 1-2 3-4 5-6

Explanation / Answer

Question 17- Difference betwwen intramolecular bond and intermolecular forces-

Question 18- Strength of intermolecular forces

Hydrogen bonding > dipole-dipole interactions > London forces

Question 19, 20, 21 - Reference data given in CTQ 13, Model 2, CTQ 20 is not availble in question.

Intramolecular bond Intermolecular forces Between atoms of same molecule holds different molecules together Strong Weak Ex- ionic bond, covalent bond, etc Ex- hydrogen bond, dipole- dipole etc

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