unit 2.3 Green Chemistry

Question 1

what is green chemistry?

Answer 1

social
economic
environmental impact

Question 2

what are non renewable fossil fuels being replaced by?

Answer 2

nuclear and renewable sources
(solar panels)
(hydroelectric)
(biomass)
(tidal)
(geothermal)

Question 3

what is hydrogen described as?

Answer 3

fuel of future but doesn’t occur naturally so must be extracted from CH4

Question 4

electrolysis of water?

Answer 4

requires energy

Question 5

carbon neutrality?

Answer 5

usually 6 marker
when sugar cane absorbs CO2 during photosynthesis but produces same amount of CO2 through combustion

Question 6

What is biomass?

Answer 6

renewable source that has carbon neutrality but is used to combust and usually takes the form of plant or animal material.

Question 7

what is solar power?

Answer 7

renewable source that generates electricity directly from the sun
sunlight is converted directly into electricity by using solar or photovoltic cells
efficiency is 18% rates

Question 8

what is Nuclear power?

Answer 8

non renewable source
Uranium that generates electricity by being destabiliised by bombarding with neutrons in a process called fission
Process = only 20 % efficient