/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Question 31.2 How would you expect the melting... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 31: Question 31.2 (page 1237)

How would you expect the melting point of eicosapentaenoic acid [CH3CH2CH=CHCH25CH22COOH]to compare with the melting points of the fatty acids listed in Table 31.2?

Short Answer

Expert verified

Answer

The melting point of eicosapentaenoic acid is expected to be lesser than arachidonic acid which comprises the maximum number of carbon atoms.

Step by step solution

01

Melting point

Numerous factors impact the melting point. Some of them include intermolecular attractions and symmetry.A molecule comprising greater intermolecular attractions comprises a more significant melting point.

02

Eicosapentaenoic acid

Eicosapentaenoic acid (EPA) comes under the category of omega-3-fatty acids. The trivial name of this acid is timnodonic acid.Some sources of EPA include fish oil, breast milk, etc.

03

Fatty acid

A particular category of fatty acid is unsaturated fatty acid. They comprise one or several C=C bonds. This can produce cis or trans isomers. An example of unsaturated fatty acid is oleic acid.

04

Comparison of the melting point of eicosapentaenoic acid with other fatty acids

In table 31.2,arachidonic acid, fatty acid with a maximum number of carbon atoms, comprises 20 carbon atoms and four double bonds.The melting point of arachidonic acid is -49掳C.

The degree of unsaturation provides information regarding the number of double bonds. The melting point of fatty acid decreases with the degree of unsaturation.

The structure of eicosapentaenoic acid comprises 20 carbon atoms and five double bonds.So, the number of carbon atoms is similar for eicosapentaenoic acid and arachidonic acid.

But eicosapentaenoicacid consist of one more double bond than arachidonic acid.

Hence, the melting point of eicosapentaenoic acid is expected to be lower than arachidonic acid.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Unlike many fats and oils, the cocoa butter used to make chocolate is remarkably uniform in composition. All triacylglycerols contain oleic acid esterified to the 掳2OH group of glycerol, and either palmitic acid or stearic acid esterified to the掳1 OH groups. Draw the structures of two possible triacylglycerols that compose cocoa butter.

(a) Draw a skeletal structure of the anabolic steroid methenolone from the following description. Methenolone contains the tetracyclic steroid skeleton with a carbonyl group at C3, a hydroxyl group at C17, a double bond between C1 and C2, and methyl groups bonded to C1, C10 and C13. (b) Add wedges and dashed wedges for all stereogenic centers with the following information: The configuration at C10 is R, The configuration at C13 is S, the configuration at C17 is S, and all substitutents at ring fusions are trans to each other. (c) Draw the structures of Primobolan, the product formed when methenolone is treated with CH3(CH2)5COCl and pyridine. Primobolan is an anabolic steroid that can be taken orally or by injection and has been used illegally by well-known Major League Baseball players.

Draw the structure of a lecithin containing oleic acid and palmitic acid as the fatty acid side chains.

Treatment of cholesterol with mCPBA results in formation of a single epoxide A, with the stereochemistry drawn. Why isn鈥檛 the isomeric epoxide B formed to any extent?

An isoprene unit can be thought of as having a head and a tail. The 鈥渉ead鈥� of the isoprene unit is located at the end of the chain nearest the branch point, and the 鈥渢ail鈥� is located at the end of the carbon chain farthest from the branch point. Most isoprene units are connected together in a 鈥渉ead-to-tail鈥� fashion, as illustrated. For both lycopene (Problem 31.26), and squalene (Figure 31.9), decide which isoprene units are connected in a head-to-tail fashion and which are not.
See all solutions

Recommended explanations on Chemistry Textbooks

Chemical Reactions

Read Explanation

Kinetics

Read Explanation

Chemical Analysis

Read Explanation

Nuclear Chemistry

Read Explanation

Ionic and Molecular Compounds

Read Explanation

Inorganic Chemistry

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.