Question 67 of 68
Q.In thermodynamics, define :
(a) Mechanical equilibrium
(b) Chemical equilibrium
(c) Thermal equilibrium
Maharashtra MsbshseMaharashtra HSC (MSBSHSE) Board 2026Subjective· 3mImportance★★★★★
99% · 67/68 Questions
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Start your 14-day free trial to unlock the full solution →A system is in complete thermodynamic equilibrium only when it simultaneously satisfies mechanical, chemical, and thermal equilibrium.
- Mechanical equilibrium: A system is in mechanical equilibrium when there is no unbalanced (net) force or pressure difference acting within the system or between the system and its surroundings. The pressure exerted by the system is exactly balanced by the pressure of the surroundings (and there is no relative acceleration of any part of the system), so no macroscopic motion or deformation occurs.
- Chemical equilibrium: A system is in chemical equilibrium when there is no further net change in its chemical composition — i.e. no net chemical reaction takes place, and there is no net diffusion or transfer of matter between different parts of the system (or between system and surroundings), because the chemical potential is uniform throughout. …
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