CentralNotice From Wikipedia, the free encyclopedia Jump to: navigation , search Thermodynamics The classical Carnot heat engine Branches Classical Statistical Chemical Equilibrium / Non-equilibrium Laws Zeroth First Second Third Systems State Equation of state Ideal gas Real gas State of matter Equilibrium Control volume Instruments Processes Isobaric Isochoric Isothermal Adiabatic Isentropic Isenthalpic Quasistatic Polytropic Free expansion Reversibility Irreversibility Endoreversibility Cycles Heat engines Heat pumps Thermal efficiency System properties Note: Conjugate variables in italics Property diagrams Intensive and extensive properties Functions of state Temperature / Entropy ( introduction ) Pressure / Volume Chemical potential / Particle number Vapor quality Reduced propertie...