Please enable JavaScript.
Coggle requires JavaScript to display documents.
Chemical Energy Practical Ideas - Coggle Diagram
Chemical Energy Practical Ideas
hydrogen fuel cell
As an electrochemical power generator, in a hydrogen fuel cell, a catalyst at the anode separates hydrogen molecules into protons and electrons, which take different paths to the cathode.
To produce electrical energy, stored hydrogen and the oxygen in the air is used. The hydrogen is fed into the fuel cell which converts the chemical energy into electricity, water and heat.
Combustion
wood: Similarly, we could use wood to demonstrate combustion, since it is more accessible and is not as complicated as coal.
Coal: Combustion reaction converts chemical energy into light and heat. Coal's energy is derived from the sun, which is then stored in chemical compounds between atoms and molecules in the form of chemical energy. The Chemical energy in coal is converted into electrical energy at a power plant. We could investigate how this occurs and maybe experiment with coal ourselves.
what is the best fuel?
we could experiment with different fuel types according to which generates the most electricity.
Compare combustions: biomass, coal, wood, natural gasses
photosynthesis: changing solar energy into chemical energy
propane: burns to produce heat and light
What variables affect a fuel cells
the variation in operating temperature of fuel cells is largely due to the physical property of the elcetrolyte which defines the cell. An increase in temperature can improve performance, however too high may lead to membrane dehydration and the degradation of components resulting in a shortened fuel cell lifetime.
Fuel cell vs renewable energy?
A fuel cell combines hydrogen and oxygen to produce electricity, heat and water. It is often compared to batteries since they both convert the energy produced by a chemical reaction into a usable electric power. Although renewable sources utilises the sun and wind etc. they can't produce energy all the time, therefore fuel cells can provide both independent power or complement variable renewable energy sources
Petroleum
When petroleum products such as gasoline are burned for energy, they release toxic gasses and high amounts of carbon dioxide and greenhouse gasses.
Petroleum is a fossil fuel and is a nonrenewable source of energy. It consists basically of only two elements, carbon and hydrogen. their large variety of combinations in complex ways vary greatly in their chemical composition.
Three technologies are used to convert oil into electricity: Conventional steam - oil is burned to heat water to creat steam to generate electricity. Combustion turbine - oil is burned under pressure to produce hot exhaust gasses which spins in a turbine to generate electricity.