Chemical Engineering Thermodynamics
If the heat of solution of an ideal gas in a liquid is negative, then its solubility at a given partial pressure varies with the temperature as

Solubility is independent of temperature
Solubility increases or decreases with temperature depending on the Gibbs free energy change of solution
Solubility increases as temperature decreases
Solubility increases as temperature increases

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

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