Why Your Car Runs on Chemistry

  1. Gasoline is a hydrocarbon mix that releases energy when its molecules combust with oxygen.
  2. Combustion in cylinders turns chemical energy into expanding gases that push pistons.
  3. Octane rating measures how smoothly fuel burns, preventing engine knock.
  4. Catalytic converters use metals like platinum to turn toxic gases into safer emissions.
  5. Antifreeze (ethylene glycol) lowers water’s freezing point, keeping engines safe in winter.
  6. Motor oil chemistry reduces friction with additives that prevent oxidation and wear.
  7. Battery reactions between lead and sulfuric acid power the starter motor and electronics.
  8. Airbags deploy using a rapid chemical reaction that generates nitrogen gas in milliseconds.
  9. Rubber tires rely on vulcanization chemistry to stay durable and flexible.
  10. Electric cars still rely on chemistry—lithium-ion batteries store and release energy for motion.