Stoichiometry
Degrees of freedom will be equal to the number of components for a system comprising of

Two liquid components and one solute (soluble in both the liquids)
None of these
Partially miscible two liquid components system having two phases
Only soluble liquid components

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Stoichiometry
Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m³ . The diffusivity of aniline in air is 0.74xl0⁻⁵m²/s.The numerical value of mass transfer co-efficient is 7.4 x 10⁻³. The rate of evaporation of aniline is 2.97 x 10⁻⁴. Its units are

Mole/m² . s
Mole/s
Kmole/m² . s
Mole/cm². s

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Stoichiometry
At 100°C, water and methylcyclohexane both have vapour pressures of 1 atm. Also at 100°C, the latent heats of vaporisation of these compounds are 40.63 kJ/mole for water and 31.55 kJ/mole for methylcyclohexane. The vapour pressure of water at 150°C is 4.69 atm. At 150°C, the vapour pressure of methylcyclohexane would be expected to be

Nearly equal to 4.69 atm
Significantly less than 4.69 atm
Significantly more than 4.69 atm
Indeterminate due to lack of data

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