Chemistry- Crude Oil + Fuels

kushagramodi56's version from 2015-04-15 12:48


Question Answer
What do fossil fuels release when burnt in airEnergy
What are fossil fuels formed fromRemains of organisms living millions of years ago
How does crude oil reach the oil rigCrude oil is formed from remains due to chemical changes. As it is less dense than water, it migrates upwards through permeable rock. Eventually, they hit impermeable rock and can't move any further. They are trapped under pressure so the oil rig enters and forces the crude oil upwards,
How is crude oil formedFormed from soft remains of sea plants and animals that fall to the ocean floor
What is crude oilA complex mixture of compounds needing refining before use
What does fractional distillation do to crude oilIt separates them into hydrocarbons with similar properties
How does fractional distillation workThe crude oil is heated to become a gas. It enters at the bottom of the column where it is hottest and become vaporised. It then rises and condenses to become a liquid depending upon their boiling points.
What are fractionsMixture of substances which are similar size and have similar boiling points.
Where are the most useful fractions collectedNear the top
Properties of short carbon chain fractions-Weak intermolecular forces -Low b.p -Burn more easily -Runny -More useful -More expensive
Properties of long carbon chain fractions- Strong intermolecular forces -High b.p -Burn less easily -Viscous -Less useful -Less expensive
What are alkanesSaturated structures containing hydrocarbons
Define saturatedOnly have single covalent bonds
Alkane general formulaCnH2n+2
Pollution from CO2Global warming
Pollution from COToxic gas
Pollution from S02 + NO2Acid rain
Pollution from particulatesGlobal dimming
What are biofuels made ofPlant/ animal products
How is ethanol producedThe fermentation of plants
What are biodiesels made fromVegetable oils processed and turned into fuels
How is hydrogen producedElectrolysis of water