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 11
A biogas plant produces 10 m³ of methane per day. If the combustion of 1 m³ of methane releases 35.8 MJ of energy, calculate the total energy produced per day.
A solar cell has an efficiency of 20%. If it receives 1000 J of solar energy, how much electrical energy does it produce?
Calculate the number of moles of water produced when 4 moles of hydrogen gas react completely with oxygen gas. (Use the equation: 2H₂ + O₂ → 2H₂O)
Describe one chemical challenge associated with the large-scale storage of hydrogen fuel.
Describe the chemical reaction that occurs during the electrolysis of water to produce hydrogen.
Describe the environmental impact of using fossil fuels compared to renewable energy sources.
Describe the role of photosynthesis in the carbon cycle and its relevance to renewable energy.
Explain the environmental advantage of using biogas over natural gas.
Explain the term 'carbon neutral' in the context of biofuels.
Explain why hydrogen is considered a clean fuel.
Explain why solar cells are considered environmentally friendly from a chemical perspective.
State the main chemical process that occurs in a hydrogen fuel cell.
