chemistry 1 Flashcards
provide an example of an experimental risk (any) and a precaution to take
skin or eye irritants
fumes
gloves and safety glasses
what must you do when comparing relationship of data
you must define the data (definitions etc)
quantitatively compare
categorise relationship (increases as increase, inversely related etc)
provide example of hypothesis of caco3 + hcl
as concentration of hcl increases, co2 gas increases
what is the fermentation equation for glucose
glucose -> ethanol + co2 gas
C6H12O6 —-> C2H5OH + CO2
what is the combustion equation for ethanol
ethanol + oxygen –> co2 gas + water
what is lpg/autogas
propane butane mix
what is e95
95% ethanol and 5% gasoline
negatives of lpg
consumed much faster, low energy density, less power, ineffective in colder climates
what is petrol
fossil fuel formed by immense pressure and heating of large quantities of dead organisms
its energy is derived from the sun
why are fossil fuels bad
release greenhouse gases and damage ozone layer leading to increased environmental damage, global warming, ecological degradation etc
why is ethanol renewable
produced from biomass, burns more cleanly than conventional fuels, reduces greenhouse gas emissions
what is “biomass”
biomass is various plant materials
what is the impact of ethanol blended fuels
ethanol reduces carbon monoxide and smog emissions, better for environment, helps fuels burn cleaner
what is butane
Biofuel is a fuel that is produced over a short time span from biomass, rather than by the very slow natural processes involved in the formation of fossil fuels, such as oil.
