Chemical Engineering Thermodynamics
Free energy

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

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Chemical Engineering Thermodynamics
In the reaction, H₂ +I₂ ⇋ 2HI, addition of an inert gas will

Increase the partial pressure of H₂
Increase the total pressure and hence shift the equilibrium towards the right
Not effect the equilibrium conditions
Increase the partial pressure of I₂

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