Thermodynamic properties are macroscopic coordinates significant only for systems existing in states of ?

Question

The choices are...

a) Thermal Equilibrium

b) Mechanical Equilibrium

c) Chemical Equilibrium

d) Thermodynamic Equilibrium

Answer 1

I assume the context of this question is equilibrium thermodynamics. Thermodynamic properties are defined for a system in thermal equilibrium. Answer (a) seems to be correct.