Assignment Help - homework help

  Physical Properties Homework Help - K-12 Grade Level, College Level Chemistry

Introduction to Physical Properties of Carboxylic Acids

The boiling points increased with size in a usual way, but the melting points did not. Unbranched acids made up of even number of carbon atoms have melting points higher than the odd numbered homologs having one more or one less carbon. This reflects variations in intermolecular attractive forces in the crystalline state. In the table of fatty acids we observe that the existence of a cis-double bond considerably lowers the melting point of a compound. So, palmitoleic acid melts over 60º lower than palmitic acid, and similar decreases take place for the C18 and C20 compounds. Again, changes in crystal intermolecular forces and packing are accountable.

The issues that affect the relative boiling points and water solubilities of several kinds of compounds were discussed previous. Generally, dipolar attractive forces among molecules act to increase the boiling point of a given compound, with hydrogen bonds being an extreme instance. Hydrogen bonding is also a chief issue in the water solubility of covalent compounds. The following table lists a few illustrations of these properties for some identical sized polar compounds (the non-polar hydrocarbon hexane is presented for comparison).

Physical Properties of Some Organic Compounds

Formula

IUPAC Name

Molecular Weight

Boiling Point

Water Solubility

CH3(CH2)2CO2H

butanoic acid

88

164 ºC

very soluble

CH3(CH2)4OH

1-pentanol

88

138 ºC

slightly soluble

CH3(CH2)3CHO

pentanal

86

103 ºC

slightly soluble

CH3CO2C2H5

ethyl ethanoate

88

77 ºC

moderately soluble

CH3CH2CO2CH3

methyl propanoate

88

80 ºC

slightly soluble

CH3(CH2)2CONH2

butanamide

87

216 ºC

soluble

CH3CON(CH3)2

N,N-dimethylethanamide

87

165 ºC

very soluble

CH3(CH2)4NH2

1-aminobutane

87

103 ºC

very soluble

CH3(CH2)3CN

pentanenitrile

83

140 ºC

slightly soluble

CH3(CH2)4CH3

hexane

86

69 ºC

insoluble

The first five entries all of them have oxygen functional groups, and the comparatively high boiling points of the first two are clearly because of hydrogen bonding. Carboxylic acids have very high boiling points, suitable in large part to dimeric associations involving two hydrogen bonds. A structural formula for dimer of acetic acid is displayed here. The high boiling points of the nitriles and amides are suitable in large part to strong dipole attractions, supplemented in some examples by hydrogen bonding.

1238_Physical Properties of Carboxylic Acids Homework Help.jpg

Qualified and Experienced Organic Chemistry Online Tutors at www.tutorsglobe.com

Tutors at the www.tutorsglobe.com take pledge to provide full satisfaction and assurance in Physical Properties of Carboxylic Acids homework help via online tutoring. Students are getting Chemistry homework help services across the globe with 100% satisfaction by online tutors. We value all our service-users. We provide email based Physical Properties of Carboxylic Acids homework help - assignment help. You can join us to ask queries 24x7 with live, experienced and qualified Chemistry online tutors specialized in Physical Properties of Carboxylic Acids. Through Online Tutoring, you would be able to complete your homework or assignments at your home.

Latest technology based Organic Chemistry Online Tutoring Assistance

Tutors at the www.tutorsglobe.com are committed to provide the best quality online tutoring assistance for homework help and assignment help services. They use their experience, as they have solved thousands of the Physical Properties of Carboxylic Acids assignments, which may help you to solve your complex Physical Properties of Carboxylic Acids homework. You can find solutions for all the topics come under the Physical Properties of Carboxylic Acids. The dedicated tutors provide eminence work on your Organic Chemistry homework help and devoted to provide K-12 level Chemistry to college level chemistry help before the deadline mentioned by the student. Physical Properties of Carboxylic Acids homework help is available here for the students of school, college and university. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
Home | Company Overview | Services | Discover Q&A | Sitemap | Contact Us | T & C | Refund Policy | Copyright Policy | Blog | Q&A | Directory

©TutorsGlobe All rights reserved 2022-2023.