are all part of the alkane homologous series. Compounds within a homologous series typically have a fixed set of functional groups that gives them similar chemical and physical properties. For example, methane, ethane, propane, butane, etc. The functional group attached to these compounds is alcohol. In chemistry, a homologous series is a series of compounds with a similar general formula, usually varying by a single parameter such as the length of a carbon chain. Read about our approach to external linking. Using a mnemonic can make learning the names easier. As a member, you'll also get unlimited access to over 83,000 [1] This can be the length of a carbon chain,[1] for example in the straight-chained alkanes (paraffins), or it could be the number of monomers in a homopolymer such as amylose.[2].

STUDY. The formula of various homologues can be written by giving the values 1, 2, 3, 4, ….. to n. (iii) The molecular mass of every two adjacent members differs by 14 (CH2 = 12 + 2 x 1 = 14).

Gravity. A series of organic compounds with the same general formula but differ from adjacent members by \" - CH2 - \" group are referred to as homologous series of compounds. A homologous series is a series of carbon compounds that have different numbers of carbon atoms but contain the same functional group. It takes more energy to disrupt the attractions and fling the molecules from the liquid state to the gas state, so the boiling point increases. A homologous series (homos is Greek for “the same as”) can be defined as the group of compounds in which the various members have similar structural features and similar chemical properties and the successive members differ in their molecular formula by one methylene (CH2) group. The name "homologous series" is also often used for any collection of compounds that have similar structures or include the same functional group, such as the general alkanes, the alkenes, the carbohydrates, etc. Homologous series is series of compounds with similar general formula and similar chemical properties due to the presence of similar functional group but structurally differ by general formula ch2 Members- Ch2,C2h6 And showing a gradation in physical properties as a …

The concept of homologous series was proposed in 1843 by the French chemist Charles Gerhardt. homologous series is called a homologue. Consider an isomeric mixture of alkenes of molar mass M = 70g/mol.

See more. (ii) All compounds in the series can be represented by one general formula, e.g., the homologous series of monohydric alcohols can be represented by the general formula CnH2n+1OH. Try refreshing the page, or contact customer support. A series of compounds of the same family in which each member has the same type of carbon skeleton and functional group, and differs from the next member by a constant difference of one methylene group (−CH 2 −) in its molecular and structural formula is called as homologous series.

Choose the correct answer: The compounds CH_3CH_3 and CH_3CH_2CH_3 are A) Isomer B) Allotropes C) Isotopes D) Homologs, Working Scholars® Bringing Tuition-Free College to the Community. Determine the molecular formula of the alkenes. For example, silanes have homologous series. {{courseNav.course.mDynamicIntFields.lessonCount}} lessons The reason homologous series are interesting when studying chemistry is because if there is a change in a physical property, it is due to the extra methylene group.

They differ from each other by one CH2 group. Log in or sign up to add this lesson to a Custom Course. Homologous Series. We truly appreciate your support. Some examples of functional groups in homologous series are alcohols (-OH), carboxylic acids (-COOH), aldehydes (COH), ketones (C=O), and amines (N), among many others. Organic compounds belonging to the main class can be divided into different families, known as homologous series, on the basis of similarity in structure and chemical properties. Ethanal CH3CHO 2. An error occurred trying to load this video. This can be the length of a carbon chain, for example in the straight-chained alkanes (paraffins), or it could be the number of monomers in a homopolymer such as amylose. In the field of organic chemistry, a homologous series is a sequence of compounds with the same functional group and similar chemical properties in which the members of the series can be branched or unbranched. (iv) All compounds in the series have similar chemical properties because of the presence of the same functional group. So when you are looking to identify homologues, the functional group will be the same. CBSE Previous Year Question Paper With Solution for Class 12 Arts, CBSE Previous Year Question Paper With Solution for Class 12 Commerce, CBSE Previous Year Question Paper With Solution for Class 12 Science, CBSE Previous Year Question Paper With Solution for Class 10, Maharashtra State Board Previous Year Question Paper With Solution for Class 12 Arts, Maharashtra State Board Previous Year Question Paper With Solution for Class 12 Commerce, Maharashtra State Board Previous Year Question Paper With Solution for Class 12 Science, Maharashtra State Board Previous Year Question Paper With Solution for Class 10, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 12 Arts, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 12 Commerce, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 12 Science, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 10, Mumbai university engineering question papers with solutions, HSC Science (General) 11th Maharashtra State Board, HSC Science (Electronics) 11th Maharashtra State Board, HSC Science (Computer Science) 11th Maharashtra State Board. Homologous definition, having the same or a similar relation; corresponding, as in relative position or structure. Not sure what college you want to attend yet? The only difference among these molecules is that they have different numbers of CH2 groups. You could definitely tell they were related, but they didn't look like carbon copies of each other. are all part of the alkane homologous series. The first homologous series is the alkanes. succeed. All other trademarks and copyrights are the property of their respective owners.

Select a subject to preview related courses: For example, the boiling point of pentane is 36.1o C, while the boiling point of the homologue hexane is 68.7o C. What causes that 30 degree jump in boiling point?

- Structure, Formula & Isomers, Butene: Structural Formula, Boiling Point & Isomers, Alkenes: Definition, Properties & Examples, Organic Molecules: Alkanes, Alkenes, Aromatic Hydrocarbons and Isomers, Carboxylic Acid: Structural Formula, Properties & Uses, Unsaturated Hydrocarbon: Definition & Examples, Dobereiner's Law of Triads & Newlands' Law of Octaves, Esterification: Definition, Process & Reactions, GACE Special Education Mathematics & Science (088): Practice & Study Guide, Virginia SOL - Chemistry: Test Prep & Practice, General Chemistry Syllabus Resource & Lesson Plans, Ohio Assessments for Educators - Chemistry (009): Practice & Study Guide, Alberta Education Diploma - Science 30: Exam Prep & Study Guide, BITSAT Exam - Chemistry: Study Guide & Test Prep, OSAT Chemistry (CEOE) (004): Practice & Study Guide. The first homologous series is the alkanes. a member of. study In the field of organic chemistry, a homologous series is a sequence of compounds with the same functional group and similar chemical properties in which the members of the series can be branched or unbranched. 106 lessons Introduction to Organic Molecules II: Monomers and Polymers, Over 83,000 lessons in all major subjects, {{courseNav.course.mDynamicIntFields.lessonCount}}, Drawing Isomers of Organic Molecules: Practice Problems, Building Molecular Models of Organic Compounds, Comparing Inorganic & Organic Compounds: Explanation & Practice, Comparing Compounds Based on Boiling Point, Alberta Education Diploma - Chemistry 30: Exam Prep & Study Guide, Biological and Biomedical

The single-ring cycloalkanes form another such series, starting with cyclopropane. Log in here for access. Other molecules besides organic compounds can have homologous series as well. A homologous series is a family of hydrocarbons with similar chemical properties who share the same general formula. There are a number of homologous series in organic compounds. Their names all end in –ane. Learn. A homologous series in organic chemistry is a group of organic compounds (compounds that contain C atoms) that differ from each other by one methylene (CH 2) group.

These properties typically change gradually along the series, and the changes can often be explained by mere differences in molecular size and mass. characteristics. Compounds within a homologous series typically have a fixed set of functional groups that gives them similar chemical and physical properties.