Cracking (AQA GCSE Chemistry Combined Science): Flashcards
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What does cracking do to hydrocarbon molecules?
What does cracking do to hydrocarbon molecules?
Breaks large molecules into smaller, more useful ones
Type of reaction cracking is
Type of reaction cracking is
Thermal decomposition
Two methods used for cracking
Two methods used for cracking
With a hot catalyst or with steam at high temperatures
Products always made when cracking an alkane
Products always made when cracking an alkane
A shorter alkane and an alkene
What alkenes contain that alkanes don't
What alkenes contain that alkanes don't
A double bond
Viscosity of smaller vs larger hydrocarbons
Viscosity of smaller vs larger hydrocarbons
Smaller ones are less viscous (less thick and sticky)
Flammability of smaller vs larger hydrocarbons
Flammability of smaller vs larger hydrocarbons
Smaller ones are more flammable
Boiling points of smaller vs larger hydrocarbons
Boiling points of smaller vs larger hydrocarbons
Smaller ones have lower boiling points
Uses of alkanes from cracking
Uses of alkanes from cracking
Fuels and feedstock for solvents/detergents
Uses of alkenes from cracking
Uses of alkenes from cracking
Making polymers (plastics) and other chemicals
Essential condition for cracking to occur
Essential condition for cracking to occur
High temperatures
What is heated in lab cracking
What is heated in lab cracking
Paraffin soaked onto mineral wool