Ĭomparing hydrocarbons (10 minutes) Students produce a comparison table of the similarities and differences between alkanes and alkenes. This should include the equation for the reaction, a definition of an alkene, a chemical test for alkenes, and an explanation why cracking is useful for industry.Ĭrack the equation (5 minutes) Ask students to write as many equations as they can for the cracking of decane, C 10 H 12. Ask students to draw a labelled diagram of the experiment and add annotations to explain how the reaction occurs. Encourage students to attempt a balanced symbol equation for this reaction.Ĭracking (40 minutes) Complete the practical as detailed. Then ask students to imagine that when these chemicals are mixed together they add to make one product. Ask them to make a bromine molecule, and a hydrocarbon with the formula C 2 H 4 (ethene).
Molecular model (10 minutes) Give students a molecular modelling Students then complete equations to describe potential products formed in the cracking of decane. (For combined science students do not need to know the formulae or names of individual alkenes.)Įthane and ethene (5 minutes) Students sort statements according to whether they describe ethane, ethene, or both. They should also be able to explain how modern life depends on the uses of hydrocarbons. Students should be able to give examples to illustrate the usefulness of cracking. Students should be able to balance chemical equations as examples of cracking given the formulae of the reactants and products. There is a high demand for fuels with small molecules and so some of the products of cracking are useful as fuels.Īlkenes are used to produce polymers and as starting materials for the production of many other chemicals. Students should be able to recall the colour change when bromine water reacts with an alkene. What is the formula of the AlkAne Write the equation C10H22 -> C2H4 + C2H4 + C6H14 the.
#DECANE CRACKING EQUATION CRACKED#
GHS P Statement: IF SWALLOWED: Immediately call a. Decane (C10H22) can be cracked into 2 EthEne molecules and an AlkAne.
#DECANE CRACKING EQUATION SKIN#
Repeated exposure may cause skin dryness or cracking. Decane is an alkane hydrocarbon with the chemical formula C 10 H 22. The products of cracking include alkanes and another type of hydrocarbon called alkenes.Īlkenes are more reactive than alkanes and react with bromine water, which is used as a test for alkenes. Molecular Formula: C10H22: Molecular Weight (g/mol) 142.286: MDL Number: MFCD00008954: InChI Key: DIOQZVSQGTUSAI-UHFFFAOYSA-N: Synonym: n-decane, nonane, methyl, decyl hydride, unii-nk85062oiy, ccris 653, hsdb 63, dsstoxcid4913, decane. Students should be able to describe in general terms the conditions used for catalytic cracking and steam cracking. (cracked) to produce smaller, more useful molecules.Ĭracking can be done by various methods including catalytic cracking and steam cracking. Cracking hydrocarbons - What you should know
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