Metamorphic (Random 0.1)

Question 1

What is a Phase?

Answer 1

Any part of the system that is physically distinct and mechanically seperable.

ex. Minerals, melt, vapor

Consists of lego bricks

Question 2

What are components?

Answer 2

The minimum chemical compounds needed it to decribe the composition of all phases in the system.

The lego bricks

Question 3

When is equilibrium?

Answer 3

The miimum energy state of the system
- T,P and phase compositions need to be constant througout the system

(Here we can know everything)

Question 4

What is Gibbs free energy?

Answer 4

• A state function
• the available energy to do chemical work (Make minerals, change mineral composition ect.)

Question 5

What is the Gibbs Phase rule?

Answer 5

F = C + 2 - phi

F = Degrees of freedom
C = number of components
phi = number of phases

Makes sure we’re not violating the rules of nature

Question 6

What is the Degrees of freedom? (F)

Answer 6

The number of system properties that must be fixed for us to know all system/phase properties

(at equilibrium)

If negative we are violating nature!

Question 7

How many degrees of freedom is there in a field? (normally)

Answer 7

F = 2

Question 8

How many degrees of freedom is there on a cotectic line?

Answer 8

F = 1
we need to know either P or T

Question 9

How many degrees of freedom is there in the eutectic point?

Answer 9

F = 0
We know everything

Question 10

What is the reduced Phase rule?

Answer 10

Used when a propertie is constant (fixed) - like P in Ternary systems

F = C+ 1 - phi