1
Question
In which process net work done is zero?
In which process net work done is zero?
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Solution
The correct options are
C Isochoric
D Free expansion
1) In terms of thermodynamics, work done is a function of pressure and volume.
2) In
free expansion there is no work done as there is no external pressure.
That's certainly true, in fact, free expansion is an irreversible process
in which a gas expands into an insulated evacuated chamber, you can
think of it like a container with a piston and the gas is left to expand
in vacuum.
3) An isochoric process is one in which the volume
is held constant (V=constant), meaning that the work done by the system
will be zero. It follows that, for the simple system of two dimensions,
any heat energy transferred to the system externally will be absorbed as
internal energy.
Hence the net work done is zero in the Isochoric and Free expansion process.
C Isochoric
D Free expansion
1) In terms of thermodynamics, work done is a function of pressure and volume.
2) In
free expansion there is no work done as there is no external pressure.
That's certainly true, in fact, free expansion is an irreversible process
in which a gas expands into an insulated evacuated chamber, you can
think of it like a container with a piston and the gas is left to expand
in vacuum.
3) An isochoric process is one in which the volume
is held constant (V=constant), meaning that the work done by the system
will be zero. It follows that, for the simple system of two dimensions,
any heat energy transferred to the system externally will be absorbed as
internal energy.
Hence the net work done is zero in the Isochoric and Free expansion process.
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