Distillation

Question 1

Dalton’s Law:

Answer 1

Pa=yaP

Question 2

Raoult’s Law:

Answer 2

Pa=xaPs

Question 3

Henry’s Law:

Answer 3

Pa=Kxa

Question 4

Which component has the higher vapour pressure?

Answer 4

The M.V.C

Question 5

Derive the volatility equation.

Answer 5

.

Question 6

Perform a flash distillation balance

Answer 6

y=-(L/V)x+(F/V)xf

Question 7

Derive Rayleigh equation for simple batch distillation.

Answer 7

.

Question 8

Describe the concept of constant molar overflow

Answer 8

Concept that for every mole of vapour that evaporates a mole of vapour condenses.

Question 9

Derive a constant relative volatility method for batch distillation

Answer 9

.

Question 10

Derive rectification operating line:

Answer 10

y=(L/V)x+(D/V)xd

Question 11

Derive stripping operating line:

Answer 11

y=(L/V)x-(B/V)xb

Question 12

q=

Answer 12

(hv-hf)/(hv-hl)

Question 13

Define weeping

Answer 13

When the liquid begins to trickle through the sieve plate in a column

Question 14

Define entrainment

Answer 14

When vapour in the column carries some liquid along with it up the column.

Question 15

Define flooding.

Answer 15

When a downcomer begins to flood causing a buildup of fluid within the column

Question 16

Derive rectification operating line in terms of reflux:

Answer 16

y=(R/R+1)x+(1/R+1)xd

Question 17

Derive the equation used to compare costs of different reflux ratios:

Answer 17

.