2.3 Green Chemistry

Question 1

Fossil Fuels

Answer 1

Substances that burn to release large amounts of heat energy (highly exothermic). They are formed from dead marine animals which have been changed due to heat and pressure under rocks.

Question 2

Fossil Fuels +/-

Answer 2

+ Abundant
+ Available globally
+ highly exothermic
+ easy to extract

-mining hazards
- combustion releases:
CO2 (greenhouse gas contributes to gw)

CO (incomplete combustion, toxic)

C (soot,incomplete - lung problems)

SO2 (formed from impurities, dissolve in the clouds and lowers pH causing acid rain,

Acid Rain:
-harms aqualife in lakes
- damages leaves
-damages buildings made from of carbonated rocks

Question 3

Charcoal and Methane Burning

Answer 3

KJ = KJ mol/ Mr

Charcoal - Carbon Neutral, produced from living trees, Trees release same amount of CO2 during than combustion than they take in for growth, Renewable

Methane - produces more energy, produces CO2, non-renewable, made from dead sea creatures trapped under rocks with heat/pressure