Cracking

    Cards (17)

    • What is meant by cracking in chemistry?
      Breaking down long chain hydrocarbons
    • What are the conditions for catalytic cracking?
      High temperature and a catalyst
    • What is the general formula for alkanes?
      CnH2n+2C_nH_{2n+2}
    • Why are long chain hydrocarbons not good fuels?
      They are not very flammable
    • What is produced when cracking a long chain alkane?
      Smaller, more useful molecules
    • What is an alkene?
      A hydrocarbon with a double bond
    • How do alkenes differ from alkanes in terms of reactivity?
      Alkenes are more reactive than alkanes
    • What test is used to identify alkenes?
      Using bromine water
    • What happens to bromine water when it reacts with an alkene?
      It turns colorless
    • What is the importance of stating that bromine water turns colorless?
      It is the correct observation
    • How do you balance a chemical equation for cracking?
      Ensure carbon and hydrogen atoms are equal
    • If a cracking equation has 25 carbon and 52 hydrogen atoms on the left, how many are on the right?
      Must equal 25 carbon and 52 hydrogen
    • In a cracking reaction, if there are 40 carbon and 82 hydrogen atoms on the left, how many are in the first product?
      33 carbon and 68 hydrogen atoms
    • What are the two methods of cracking hydrocarbons?
      • Catalytic cracking: uses high temperature and a catalyst
      • Steam cracking: uses high temperature and steam
    • What are the uses of alkenes?
      • Used to make polymers
      • Serve as starting materials for other chemicals
    • What are the key features of alkanes?
      • General formula: CnH2n+2C_nH_{2n+2}
      • Only single covalent bonds between carbon atoms
    • Why is cracking necessary in the oil industry?
      • Converts long chain hydrocarbons into shorter, more useful fuels
      • Meets high demand for short chain hydrocarbons