Week 2

Question 1

what the rate of separation governed by

Answer 1

mass transfer

Question 2

what the extent of separation process is limited by

Answer 2

thermodynamic equilibrium

Question 3

At equilibrium there is ____ net transfer

Answer 3

no

Question 3

Dalton’s law

Answer 3

sum of partial pressures equals total pressure

Question 3

Raoult’s law

Answer 3

Vapour pressure of J = mol fraction of A * vapour pressure of pure A

Question 4

Henry’s law

Answer 4

When the liquid composition is very small. Vapour pressure of J = mol fraction of A * Henry’s constant for A

Question 5

The result of material balance equations between streams entering & leaving a separation unit

Answer 5

Operating line

Question 6

Material balance when stream reach equilibrium. Determines the degree of separation

Answer 6

Equilibrium line

Question 7

Is a separation stage in which equilibrium has been allowed to be achieved

Answer 7

Ideal stage

Question 8

mixture of two or more components in fluidic states whose proportions cannot be altered or changed by simple distillation

Answer 8

azeotrope

Question 9

A method used to find the vapour-liquid equilibrium ratios for different substances at different conditions of pressure and temperature

Answer 9

DePriester Charts

Question 10

Ratio of partial pressure to the mole fraction in the liquid

Answer 10

volatility

Question 11

ratio of the individual volatilities

Answer 11

relative volatility

Question 12

indicates that both the vapour and the liquid phases have the exact same composition, at which point no further enrichment can occur in azeotropes

Answer 12

pinch point

Question 13

Antoine equation

Answer 13

p* = A - (B/T+C)

Question 14

Relative volatility of A

Ratio of the partial pressure to the mole fraction in the liquid

Answer 14

Pa/Xa
partial pressure of A/ mole fraction of A

Question 15

Relative volatility of A

Relative volatility of component A to component B

Answer 15

Pa * Xb/ Xa *Pb

Question 16

Rapid transfer means the system is ____ from equilibrium

Answer 16

far

Question 17

________ transfer means the system is far from equilibrium

Answer 17

Rapid

Question 18

Mol fraction A (Xa) Dalton and Raoult’s law

Answer 18

P-PA / PA - P*B

Question 19

Henry’s law is used when liquid composition is very ____.

Answer 19

small

Question 20

K-value equations

Answer 20

yA = Kxa