(1) Temperature of every part of the system must be the same.
(2) There should not be net unbalanced forces on a part or whole of the system.
(3) There should be no changes due to chemical reactions.
(1) Temperature of every part of the system must be the same.
(2) There should not be net unbalanced forces on a part or whole of the system.
(3) There should be no changes due to chemical reactions.