Q.

A system is said to be in thermal equilibrium if

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a

the macroscopic variables do not change in time

b

the microscopic variables do not change in time

c

the macroscopic variables change in time

d

the microscopic variables change in time

answer is A.

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Detailed Solution

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In thermal equilibrium the macroscopic variables like pressure, volume, temperature, mass and composition do not change with time.

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