Sun October 07, 2012 By:
i) thermodynamic state is not the same as the physical state?
ii)then what do we mean by thermodynamic state? and escited state in terms of therodynamics?

excited state in equilibrium?

Expert Reply
Mon October 08, 2012
(i and ii) Yes, they are not same.
The term physical state means the current phase of an element or compound : solid, liquid, gas, plasma (very hot), or Bose-Einstein condensate (very cold).

thermodynamic state is a set of values of properties of a thermodynamic system that must be specified to reproduce the system. The individual parameters are known as state variablesstate parameters or thermodynamic variables.
(iii) Yes. An excited state of a system is any quantum state of the system that has a higher energy than the ground state (that is, more energy than the absolute minimum). 
(iv) No equilibrium is not lost during excieted state. 
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