01 to 04

Question 1

For any system at equilibrium, the number of independent variables that must be arbitrarily fixed to establish its intensive state or degrees of freedom of the nonreacting systems.

Answer 1

Phase Rule

Question 2

What is the equation for phase rule?

Answer 2

F = 2 - π + N

Question 3

In F = 2 - π + N, what is π refers to?

Answer 3

number of phases

Question 4

In F = 2 - π + N, what is N refers to?

Answer 4

number of chemical species

Question 5

Who proposed the phase rule and in what year?

Answer 5

J.W. (Josiah Willard) Gibbs, 1875

Question 6

It is a homogeneous region of matter. A gas or a mixture of gases, a liquid or a liquid solution, and a crystalline solid are examples.

Answer 6

Phase

Question 7

Various phases can coexist, but on what condition must it possess for the phase rule to apply?

Answer 7

It must be in equilibrium

Question 8

What is the minimum number of degrees of freedom for any system?

Answer 8

0

Question 9

What is π and N at the triple point?

Answer 9

π=3, N=1

Question 10

How many degrees of freedom has in liquid water in equilibrium with its vapor?

Answer 10

F = 2 - π + N
F = 2 - 2 + 1
F = 1

Question 11

How many degrees of freedom has in a liquid solution of alcohol in water in equilibrium with its vapor?

Answer 11

F = 2 - π + N
F = 2 - 2 + 2
F = 2

Question 12

It is found in the sub-cooled liquid and the superheated-vapor regions.

Answer 12

Isotherms