Chemical Engineering Thermodynamics
In Joule-Thomson porous plug experiment, the

Temperature remains constant
Enthalpy does not remain constant
Entire apparatus is exposed to surroundings
None of these

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Chemical Engineering Thermodynamics
The second law of thermodynamics states that

The energy change of a system undergoing any reversible process is zero
It is not possible to transfer heat from a lower temperature to a higher temperature
The total energy of system and surrounding remains the same
None of these

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