Chemical Engineering Thermodynamics
Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called __________ solutions.

None of these
Real
Ideal
Isotonic

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

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