- Mass Transfer - Section 1
- Mass Transfer - Section 2
- Mass Transfer - Section 3
- Mass Transfer - Section 4
- Mass Transfer - Section 5
- Mass Transfer - Section 6
- Mass Transfer - Section 7
- Mass Transfer - Section 8
- Mass Transfer - Section 9
- Mass Transfer - Section 10
- Mass Transfer - Section 11
- Mass Transfer - Section 12
- Mass Transfer - Section 13
- Mass Transfer - Section 14


Mass Transfer - Engineering
Q1: When the liquid phase and vapour phase of a binary system obeys Raoult's and Dalton's law respectively, the relative volatility is the ratio ofA vapour pressure of component A to that of component B.
B vapour pressure of component A to the total pressure.
C vapour pressure of component A to the partial pressure of A.
D partial pressure of component A to the total pressure.
ANS:A - vapour pressure of component A to that of component B. In a binary system where the liquid phase obeys Raoult's law and the vapor phase obeys Dalton's law, each component contributes independently to the total vapor pressure of the system. The vapor pressure of each component (A and B) in the liquid phase is determined by Raoult's law, which states that the partial pressure of a component in the vapor phase is directly proportional to its mole fraction in the liquid phase and its vapor pressure at that temperature. Now, considering the relative volatility (𝛼α), it represents the tendency of one component (let's say component A) to preferentially vaporize compared to another component (component B) at a given temperature. Mathematically, it is expressed as: 𝛼=𝑃𝐴𝑃𝐵α=PBPA Where:
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