Thermodynamics
Heat, entropy and the laws of thermodynamics.
Thermo
How the Laws of Thermodynamics Work, Explained
The four laws of thermodynamics explained in plain language, with the first-law energy bookkeeping, Carnot efficiency worked out and a summary table.
ThermoWhat Is Entropy? Boltzmann's Idea Explained Simply
Entropy explained as counting microstates, with Boltzmann's formula, a coin-toss table, a melting-ice calculation and common misconceptions cleared up.