Erik Lindahl

Thermodynamic T
• Minor perturbations:
• F->F+dF = F + dE - TdS - SdT
• At equilibrium under constant V & T,
this leads to:
dF=dE-TdS=0
• or: T = dE/dS (similarly T=dH/dS)
• This is the thermodynamic definition
of temperature!