Chemical Engineering Thermodynamics
Free energy

Remains unchanged in reversible processes carried at constant temperature and pressure
All of these
Change during a spontaneous process has a negative value
Decreases in all spontaneous (or irreversible) processes

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Chemical Engineering Thermodynamics
Which one is true for a throttling process?

A gas may have more than one inversion temperatures
The inversion temperature is different for different gases
The inversion temperature is same for all gases
The inversion temperature is the temperature at which Joule-Thomson co-efficient is infinity

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