I had made a table comparing all the difference between. Why do you think alkenes react with bromine water but alkanes dont. Alkenes have physical properties low boiling points, insoluble in water quite similar to those of their corresponding alkanes. Physical properties the simplest alkenes are gases at room temperature, then liquids, finally solids, due to increased molecular mass. This is because each molecule is identical in terms of types of atom and bonds present, the only difference being the regular increase in. Addition reactions of alkenes are useful in organic synthesis. The longer the alkane the more ways there are to rearrange the atoms differently. It involves heat, great pressure and the presence of a catalyst.
It can be used to aid learning of the topic or as a revision resource. Reactivity of alkanes properties of alkanes alkenes and alkynes nomenclature isomers preparation of alkenes and. Please continue to edit this book and improve formatting. Alkanes, cycloalkanes, and functional groups naming alkanes. Physical properties of alkanes boiling point of straight chained alkanes. In particular, these molecules can participate in a variety of addition reactions and can be used in polymer formation. Worksheets and lesson ideas to challenge students to think hard about crude oil, alkanes and alkenes gcse and key stage 3 the chemistry of carbon compounds is an exciting one. As the number of carbon atoms in a straight chain alkane increases, the boiling points rise in a uniform and predictable manner. The process of adding hydrogen across a double bond is sometimes referred to as hydrogenation. However, due to the enormous amount of hydrocarbons burnt over the years the level of carbon dioxide has risen to dangerous levels. Organic chemistry is the study of carbon compounds, so the study of organic chemistry is important because all living things are based on carbon compounds. Visualizations are in the form of java applets and html5 visuals. Pentane only refers to a straight chain of 5 carbon atoms singly bonded to.
This video explain the properties of alkenes, its general formula and how to name and draw alkene molecules for students preparing for gcse and olevel chemistry exam. Each chapter starts with an opening section covering an application. Gcse chemistry index page what is an alkane revision. Organic chemistry now forms a substantial part of the gcse specifications. Concept maps have been added, which together with summaries throughout, aid. The physical properties of alkenes are much like those of the alkanes. Gcse chemistry the periodic table index search gcse physics. Learn here about the organic molecules alkanes and alkenes and how they are defined and how they react.
Alkanes and alkenes organic chemistry wyzant resources. Organic chemistry starters 1618 resource rsc education. Alkenes and alkynes are generally more reactive than alkanes due to the electron density available in their pi bonds. Whereas alkenes produce a smoky yellow flame as they dont fully combust. Naming molecules alkanes, alkenes and plastics gcse. Alkanes are the main constituent of crude oil, which is an important raw material for the chemical industry. Discover the differences between alkanes and alkenes, and learn about the properties and uses of polymers with bbc bitesize gcse chemistry wjec. Ocr a chemistry chemistry gcse urgent why are alkenes more likely to undergo incomplete combustion than alkanes. This lesson is designed for the new aqa trilogy chemistry gcse, particularly the organic chemistry sow. Cracking and alkenes crude oil, hydrocarbons and alkanes. The rules in naming alkenes and alkyles are generally similar to naming alkanes, but also include denoting multiple bonds. While alkanes and alkenes are both hydrocarbons, the primary difference is that alkanes are saturated molecules, containing only single covalent bonds. This leads to them having different properties, and different chemistry.
Hydrocarbons, alkanes, electrophilic addition reactions, electrophilic attack, stability of carbocation. The topics covered in this starter for ten activity are. Alkanes alkanes and alkenes gcse chemistry single science. Choose from 500 different sets of gcse chemistry alkanes flashcards on quizlet. Alevel chemistryocr saltersalkenes wikibooks, open. Covalent bonds are formed when atoms share pair of electrons. Some further addition reactions of ethene are shown. They are both hydrocarbons and therefore follow the. Alkenes are more reactive than alkanes and react with bromine water. Discover the differences between alkanes and alkenes with bbc bitesize gcse chemistry. Gcse chemistry revision organic chemistry crude oil. The chainis the line of carbon atoms joined together.
From alkanes to phospholipids handbook of lipid research vol 4 on free shipping on qualified orders. Petrol and other fuels are produced from it using fractional distillation. Longer alkanes have structural isomers different arrangements of the same atoms so the formula is the same. The rules for alkenes are similar to those used for alkanes. Alkanes are useful as fuels and alkenes are used to make chemicals such as plastic.
A giant molecule composed of a repeating structural unit monomer. Alkanes are also used as fuels and the environmental consequences of this use are considered in this section. Learn gcse chemistry alkanes with free interactive flashcards. Chemistry for edexcel international gcse hodder education. New aqa gcse 2016 chemistry reactions with alkenes. Plus great graphics to understand everything better. Alkenes alkanes, alkenes and plastics gcse chemistry. Alkenes are relatively stable compounds, but are more reactive than alkanes because of the reactivity of the carboncarbon. Hydrocarbons are chain molecules of varying lengths made from hydrogen and carbon atoms only, joined together by covalent bonds. Homologous series means that the series has the same general formula and the compounds have similar properties and structure, differing only in the number of ch 2 units in the chain. Youll see that our gcse chemistry, along with biology and physics, is a clear straightforward. Graphical educational content for mathematics, science, computer science. Unsaturated hydrocarbons can participate in a number of different addition reactions.
To work out the best way to distinguish alkanes from alkenes. To find a word on this page, press f3 on your keyboard and enter text into the box. Carbon can form covalent bonds with itself and other elements to create a mindboggling array of structures. Video on alkanes and alkenes for gcse students studying for core science chemistry. Alkanes and alkenes are both families of hydrocarbons. This powerpoint helps explain alkanes and alkenes, giving information about.
Alcohols form a homologous series like alkanes and alkenes see table 2. New aqa 2016 gcse chemistry organic lesson 6, 7 and 8 alkenes chemistry. Edexcel international gcse chemistry student book second edition. Aqa gcse chemistry separate unit 7 organic chemistry higher revision activity mat.
The table below gives some physical properties for the first eight straight chained alkanes in the alkane homologous series. This book covers the crude oil, hydrocarbons, alkanes and alkenes topic within the gcse science specification. Included is a differentiated worksheet to summarise the two groups. Alkanesandalkenesworksheet how can we distinguish between alkanes and alkenes. Each topic is treated from the beginning, without assuming prior knowledge. You need to know about alkanes, alkenes, crude oil and the process of cracking. Alkanes and alkenes chemistry week powerpoint teacher made. Alkanes are less dense than water and swim on top of water. Alkanes and alkenes a handy introduction to alkanes and alkenes, their similarities, and differences. Organic chemistry teaching resources the science teacher. Combustion alkanes and alkenes gcse chemistry single. Name the test used to determine where an alkene is present. These help students to understand the relevance of the topic.
Which of the following is are true of the process of polymerisation. Their properties are similar to those of alkanes meaning that they are nonpolar, have low solubility in water and have low melting and boiling points. In addition to this you will need to know about functional groups such as alcohols. Why is it that organisms on earth have evolved to be organic chemistry teaching resources read more. This holds true for the two compound groups, alkanes and alkenes. Dealing with organic compounds in chemistry can feel overwhelming. Ii alkanes, alkenes, and alkynes school of chemistry and. Students are firstly introduced to the idea of a homologous series and look at how this applies to the pattern of formulae for the alkene series. Alkanes and alkenes worksheet igcse coordinated sciences. New aqa 2016 gcse chemistry organic lesson 6, 7 and 8. Cracking is used to convert long alkanes into shorter, more useful hydrocarbons. Sal and jay cover topics covered in college organic chemistry course. Alkenes and alkynes are much more reactive than alkanes.
It is the process of breaking down a large molecule. In organic chemistry, we will learn about the reactions chemists use to synthesize crazy carbon based structures, as well as the analytical methods to characterize them. Carbon dioxide itself is not poisonous and is found naturally in the atmosphere. Preparations include the dehydration of alcohols, the dehydrohalogenation of alkyl halides, and the dehalogenation of alkanes. A repository of tutorials and visualizations to help students learn computer science, mathematics, physics and electrical engineering basics. I had made a table comparing all the difference between alkanes and alkenes. A small difference in the molecule changes the name and can drastically change the reactivity of the compound. In addition to this you will need to know about functional groups such as alcohols, carboxylic acids and esters and how to draw their structures.
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