Concept explainers
(a)
Interpretation: The reason as to why one isomer has a lower melting point but higher boiling point is to be stated.
Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain
(b)
Interpretation: The reason behind the small difference in the boiling points of the given compounds, but a huge difference in their melting points is to be stated.
Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain alkanes have low boiling point than straight chain alkanes because in branched chain alkanes, surface area is less.
Want to see the full answer?
Check out a sample textbook solutionChapter 4 Solutions
Organic Chemistry (Looseleaf) - With Access
- As you can see from Table 11.4, each CH2 group added to the carbon chain of an alkane increases its boiling point. This increase is greater going from CH4 to C2H6 and from C2H6 to C3H8 than it is going from C8H18 to C9H20 or from C9H20 to C10H22. What do you think is the reason for this differencearrow_forwardDraw all alcohols with the formula C5H12O.arrow_forwardGlucose, C6H12O6, contains an aldehyde group but exist predominantly in the form of the cyclic hemiacetal show below. A cyclic hemiacetal is formed when the —OH group of one carbon bonds to the carbonyl group of another carbon. Identify which carbon provides the —OH group and which provides the —CHO? Give a functional isomer of glucose and draw its structure.arrow_forward
- which functional groups are in C6H12O2 with it having 1 degree of saturation, and is the molecule hexanoic acid?arrow_forwardAlkanes are hydrocarbons containing only single bonds. Acyclic alkanes have carbon atoms arranged in chains, whereas cycloalkanes have carbon atoms arranged in one or more rings. How many hydrogen atoms are in an acyclic alkane with 6 carbon atoms?arrow_forwardOne mole of an unknown hydrocarbon, compound C, in the presence of a platinum catalyst, adds 98.9 L of hydrogen, measured at 744 mm Hg and 22 degrees C , to form a saturated alkane which contains one ring. When one mole of compound C is reacted with ozone, followed by reduction with (CH3)2S , four moles of only one product was formed, whose condensed molecular formula is CHO -CHO. Give the structure of compound C. Explain your reasoningarrow_forward
- Draw and name the five cycloalkane structures of formula C5H10. Can any of these structures give rise to geometric (cis-trans) isomerism? If so, show the cis and trans stereoisomersarrow_forwardDraw the structures of the 3 isomers of C8H18 that contain 3 methyl branches on the main chain, 2 of which are on the same carbon.arrow_forwardWhich of the following straight-chain alkanes has the highest boiling point? A) C₃H₈ B) C₁₀H₂₂ C) C₇H₁₆ D) C₅H₁₂ E) C₉H₂₀arrow_forward
- Chemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning
- Chemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage Learning