Chemical Engineering Thermodynamics
Which of the following is not a reversible process ?

None of these
Atmospheric pressure vaporisation of water at 100°C
Expansion of an ideal gas against constant pressure
Solution of NaCl in water at 50°C

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Chemical Engineering Thermodynamics
The adiabatic throttling process of a perfect gas is one of constant enthalpy

In which there is a temperature drop
Which is exemplified by a non-steady flow expansion
Which can be performed in a pipe with a constriction
In which there is an increase in temperature

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