Comparing Energy Sources: Fossil Fuels vs. Biofuels
The primary distinction between fuel types is their origin and timescale of formation, which dictates their renewability. Fossil fuels are finite resources from ancient biomass, while biofuels are renewable sources from contemporary biomass. Use the buttons to toggle between petrol (octane) and bioethanol to see how their properties and environmental contexts differ.
Energy Density Comparison (kJ/g)
The Chemistry of Combustion
Combustion is an exothermic redox reaction that releases energy from fuels. The molar enthalpy of combustion (ΔHc) is the energy released when one mole of fuel burns completely. The nature of the products, and the energy released, depends on the availability of oxygen. Explore this relationship below.
Combustion Type Explorer (Methane)
Stoichiometry Calculator
Using a balanced equation, we can relate reactant and product quantities. Calculate the volume of CO₂ produced at SLC (25°C, 100kPa, Vm = 24.8 L/mol) from the complete combustion of butane (C₄H₁₀).
Volume of CO₂ at SLC:
– L
Measuring Heat of Reaction: Calorimetry
Calorimetry is the experimental method for measuring the heat absorbed or released in a chemical reaction. Understanding this process is key to determining the energy content of fuels and foods. Explore the principles and calculations below.
Enthalpy of Combustion Calculator (Hexane, C₆H₁₄)
Molar Enthalpy of Combustion (ΔHc):
– kJ mol⁻¹
From Chemical to Electrical Energy
Electrochemistry is the study of how chemical energy can be converted into electrical energy. This is achieved in devices like galvanic cells and fuel cells, which harness spontaneous redox reactions. Explore the fundamentals before building your own virtual cell.
