Crude Oil and HydrocarbonsAQA GCSE Chemistry: Flashcards
Card 1 of 120 of 12 known
Question
What is crude oil?
Tap or press Space to reveal
Tap card or press Space to flip
See all 12 cards
- What is crude oil?
- A finite resource found in rock; a mixture made up mainly of hydrocarbons
- What is a hydrocarbon?
- A molecule made up of only hydrogen and carbon atoms
- What is the general formula for alkanes?
- CₙH₂ₙ₊₂
- Name the first four alkanes.
- Methane, ethane, propane and butane
- How is crude oil separated into fractions?
- By fractional distillation, which separates hydrocarbons using differences in boiling point
- Give two examples of fuels produced from crude oil fractions.
- Petrol and diesel oil (also kerosene, heavy fuel oil, liquefied petroleum gases)
- Give two examples of feedstock uses from crude oil fractions.
- Solvents and polymers (also lubricants and detergents)
- How does boiling point change as hydrocarbon molecular size increases?
- Boiling point increases
- How does flammability change as hydrocarbon molecular size increases?
- Flammability decreases
- How does viscosity change as hydrocarbon molecular size increases?
- Viscosity increases (the liquid becomes thicker)
- What are the products of complete combustion of a hydrocarbon?
- Carbon dioxide and water
- Write the balanced equation for the complete combustion of methane.
- CH₄ + 2O₂ → CO₂ + 2H₂O