Alkenes and Ethanol 3.0 / 5 based on 1 rating ? ChemistryFunctional groups: Alkanes, alcohols, carboxylic acids and estersGCSEAQA Created by: ZaraCreated on: 11-01-13 23:22 What bond do Alkenes have? A C=C doble bond 1 of 27 Are Alkenes saturated or unsaturated? Unsaturated 2 of 27 Why are Alkenes unsaturated? Because they can make more bonds 3 of 27 What is the first alkene? Ethene 4 of 27 What is the second alkene? Propene 5 of 27 What is the general formula of an alkene? CnH2n 6 of 27 What is the formula of ethene? C2H4 7 of 27 What is the formula of propene? C3H6 8 of 27 How can you test for an alkene? By adding the substance to bromine water. 9 of 27 What will happen to the bromine water? An alkene will decolourise the bromine water (turning it from orange to colourless) 10 of 27 Why does an alkene decolourise the bromine water? Because the double bond has opened up and formed bonds with the bromine 11 of 27 What can ethene be reacted with to produce ethanol? Steam 12 of 27 Why is the process of ethene being reacted with steam to produce ethanol cheap? Because ethene's fairly cheap and not much of it is wasteful 13 of 27 What is the trouble with ethene? Ethene is produced from crude oil, which is a non-renewable resource that could start running out fairly soon 14 of 27 Using ethene to make ethanol will become very.......? Expensive 15 of 27 What else can ethanol be produced from? Renewable resources 16 of 27 What is the alcohol in beer and wine made from? Fermentation 17 of 27 What is the raw material from fermentation? Sugar 18 of 27 Sugar is converted into ethanol using.....? Yeast 19 of 27 What is the word equation for sugar being converted into ethanol? sugar ----> carbon dioxide + ethanol 20 of 27 What is an advantage of using sugar? It is a renewable resource 21 of 27 Where and how is sugar grown? As a major crop in several parts of the world, including many poorer countries 22 of 27 What is good about the way the ethanol produced by fermentation? The ethanol produced this way can be used as quite a cheap fuel in countries which don't have oil reserves for making petrol 23 of 27 What are the disadvantages of fermentation? The ethanol produced from this process isn't very concentrated and it needs to be purified 24 of 27 If you want to increase the strength of ethanol what do you have to do? Distil it 25 of 27 Are Alkanes saturated or unsaturated? Saturated 26 of 27 Do alkanes decolourise bromine water? No 27 of 27
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