Chemical Engineering Thermodynamics
The expression, nRT In P₁/P₂ , is for the____of an ideal gas.

Work done under adiabatic contition
Compressibility
Work done under isothermal condition
Co-efficient of thermal expansion

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Chemical Engineering Thermodynamics
A reasonably general expression for vapour-liquid phase equilibrium at low to moderate pressure is Φi yi P = Yi xi fi° where, Φ is a vapor fugacity component, Yi is the liquid activity co-efficient and fi° is the fugacity of the pure component i. the Ki value (Yi = Ki xi) is therefore, in general a function of

Temperature and pressure only
Temperature, pressure, liquid composition xi and vapour composition yi
Temperature only
Temperature, pressure and liquid composition xi only

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