Chemical Aspects of Renewable Energy Sources
Chemistry ⇒ Environmental Chemistry
Chemical Aspects of Renewable Energy Sources starts at 11 and continues till grade 12.
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See sample questions for grade 12
A biogas plant produces 10 m³ of methane per day. If the combustion of 1 mole of methane releases 890 kJ, calculate the total energy produced per day. (Assume 1 mole of methane = 22.4 L at STP)
A solar cell has an efficiency of 20%. If the incident solar power is 1000 W/m², what is the electrical power output per square meter?
Calculate the mass of CO₂ produced when 1 mole of ethanol (C₂H₅OH) is completely combusted. (Molar mass: C₂H₅OH = 46 g/mol, CO₂ = 44 g/mol)
Describe one chemical limitation of using batteries for large-scale renewable energy storage.
Describe the chemical process of fermentation in the production of bioethanol.
Describe the chemical process that occurs in a lithium-ion battery during discharge.
Describe the role of catalysts in the production of biodiesel from vegetable oils.
Describe the role of enzymes in the production of cellulosic ethanol.
Explain the environmental impact of nitrogen oxides (NOₓ) produced during the combustion of biofuels.
Explain the term 'carbon neutrality' in the context of biofuels.
Explain why the use of renewable energy sources can help reduce acid rain.
Explain why the use of renewable energy sources is important for mitigating climate change.
Explain why water electrolysis is considered a clean method for hydrogen production when powered by renewable energy.
Explain why wind energy is considered a clean energy source from a chemical perspective.
Name one environmental advantage of using solar energy over fossil fuels.
State the main chemical reaction that occurs in a hydrogen fuel cell.
