D - the first law of thermodynamics

PX154 - D1 - introduction
PX154 - D2 - the first law
PX154 - D3 - work and the pV diagram
PX154 - D4a - isobars
PX154 - D4b - isochore
PX154 - D4c - isotherm
PX154 - D4d - interlude
PX154 - D4e - adiabat
PX154 - D5 - summary of processes