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CHEM 219 Module 2 Exam Newest 2026-2027 Actual Exam Preparation With Complete Questions And Correct Answers With Rationales | Already Graded A+||Brand New Version!!
What is the important thing to know about the physical properties of alkanes. - ANSWER-They will show similar trends in terms of their physical properties.
What does the physical properties of a molecule refer to? - ANSWER-Characteristics like melting point, boiling point, density, solubility.
How do you compare the boiling point of alkanes? - ANSWER- The longer the length of carbon, the higher the Boiling point.When it is branched, it can have a higher boiling point, as long as it isn't the parent chain that is branched.
Are alkanes soluble in water? - ANSWER-They are water- insoluble.
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Are alkanes polar or non-polar? - ANSWER-Almost non-polar
What is hydrogen bonding? - ANSWER-The water molecules are attracted to each other like magnets because of it's electron rich O atom possessing a -charge and its electron poor H possessing a + charge
What will a mixture of alkane and water make? - ANSWER-A two layer-biphasic system. It will float on top of water. since its density is less than 1g/ml
Are liquid alkanes used as solvents? - ANSWER-Yes for other non polar substances.
When compared to other polar molecules of similar weight, are alkanes lower or higher in melting and boiling points? - ANSWER-They are lower.
What are Van der Waals forces? - ANSWER-The attractive forces between molecules.
The polarization in VDWF's are: - ANSWER-Temporary and
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What is the relationship between branching and VDWF? - ANSWER-As you branch out you gain more surface area and lower the VDWF. Which lowers the BP and MP
Alkanes can adopt different conformations, What does this mean? - ANSWER-This means that it can change shapes as it can rotate around bonds.
Hydrogen bonding and VDWFS are classifies as nonbonding intermolecular forces, what does this mean? - ANSWER-That they are attractive forces between molecules that are not true bonds in the sense of sharing or donating.
What are conformers? - ANSWER-Different shapes of molecules that are derived by rotations of single bonds.
What does the Newman projection do? - ANSWER-It shows the conformation of molecules when looking down a particular bond axis.
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