Chemistry
What things are made of, and why they react
Batteries, corrosion, plastics and propellants are all chemistry. This track builds from atoms up to the reactions that store energy and eat metal, which is where the chemical engineering world starts.
Matter and Reactions
Atoms, bonding, moles and states
- Atoms & the Periodic TableFreeWhat an atom is made of, why the periodic table is arranged as it is, and why that arrangement predicts behaviour.12 min
- Bonding & StructureFreeIonic, covalent and metallic bonding, and why the bonding decides whether something conducts, melts or bends.13 min
- Moles & Balanced EquationsFreeThe counting unit chemistry runs on, and how to work out how much of one substance reacts with how much of another.14 min
- States of Matter & Gas LawsFreeSolid, liquid and gas as arrangements of particles, and the gas law that relates pressure, volume and temperature.13 min
Chemistry That Does Work
Energy, rates, batteries and materials
- Energetics & EnthalpyWhy some reactions release heat and others absorb it, and how bond energies let you predict which.13 min
- Rates & EquilibriumWhat controls how fast a reaction goes, and what happens when it goes both ways at once.14 min
- Electrochemistry & BatteriesWhere the voltage in a cell actually comes from, and why a battery sags under load and dies in the cold.14 min
- Materials & CorrosionPolymers, alloys and the electrochemistry that quietly destroys metal structures from the inside.13 min
The first module of every subject is free with an account. No card needed.