Chemical Engineering Thermodynamics
It is desired to bring about a certain change in the state of a system by performing work on the system under adiabatic conditions.

The amount of work needed is independent of path
More information is needed to conclude anything about the path dependence or otherwise of the work needed
Work alone can not bring out such a change of state
The amount of work needed is path dependent

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

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

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