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A system is said to be in thermal equili...

A system is said to be in thermal equilibrium if

A

the macroscopic variable do not change in time

B

the microscopic variable change in time

C

the macroscopic variables depend on time

D

none of above

Text Solution

Verified by Experts

The correct Answer is:
A
In thermal equilibrium the macroscopic variables like pressure, volume, temperature mass and composition do not change with time.
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Knowledge Check

  • System is said to be in thermodynamic equilibrium when

    A
    temperature does not change with time
    B
    pressure and volume does not change with time
    C
    chemical composition does not change with time
    D
    all of the above

  • A system X is neither in thermal equilibrium with Y nor with Z. The systems Y and Z

    A
    must be in thermal equilibrium
    B
    cannot be in thermal equilibrium
    C
    may be in thermal equilibrium.
    D
    None of the above

  • Two gases are said to be in thermal equilibrium when they have same

    A
    Pressure
    B
    Volume
    C
    Temperature
    D
    Area

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    Two system in thermal equilibrium with a third system separately are in thermal equilibrium with each other. The above statement is

    "Two systems in thermal equilibirum with a third system separately are in thermal equilibrium with each other". The aove statement is

    Assertion(A) : Two systems which are both in thermal equilibrium with the third system are in thermal equilibrium with one another. Reason(R ) : The heat flows spontaneously from a system at high temperature to a system at low temperature.

    Assertion: Two systems, which are in thermal equilibrium with a third system, are in thermal equilibrium with each other. Reason: The heat flows spontaneously from a system at a higher temp. to a system at a lower temp.

    Assertion: The zeroth law said that , when two systems A and B, are in thermal equilibrium, there must be a physical quantitiy that has the same value for both. Reason : The physical quantity which is same for both system is temperature.

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