Phase And Phase Diagram

Question 1

What is a phase?

Answer 1

A phase is any homogenous and physically distinct part of a system, bounded by a surface called a BOUNDARY.

Question 2

What is a phase diagram?

Answer 2

A phase diagram is a graphical representation of the physical state of a substance under different temperatures and pressure.

Question 3

What is triple point?

Answer 3

Triple point is a point on the phase diagram at which the boundary of the three phases meet and co-exist, occuring at a definite temperature and pressure.

Question 4

What is a critical temperature?

Answer 4

This is the temperature at which a liquid interface disappears, above which a liquid does not exist and vapour cannot be liquified.

Question 5

What is critical pressure?

Answer 5

Critical pressure is the pressure required to turn a gas back to liquid at its critical temperature.

Question 6

What is critical point?

Answer 6

This is the point in temperature and pressure where the liquid and gaseous phase merge into a single phase.

Question 7

What is the critical temperature of water?

Answer 7

647.096K

Question 8

What is the critical pressure for water?

Answer 8

22900000pa, or 22.9Mpa, or 217.75atm

Question 9

Draw the phase diagram of CO2

Answer 9

https://drive.google.com/file/d/1P5h_eh6bKiOY5VGT18U4OlbyhltSdGN0/view?usp=drivesdk

Question 10

Draw the phase diagram of Water

Answer 10

https://drive.google.com/file/d/1PO6nlDn9C4KGQiN4bj9P1bK1BV1thWp9/view?usp=drivesdk

Question 11

What is the triple point temperature of water?

Answer 11

0.16°C, or 273.16K

Question 12

What is the triple point pressure of water?

Answer 12

0.06atm

Question 13

What is the triple point temperature of CO2?

Answer 13

-56.6°C, or 197.5k

Question 14

What is the triple point pressure of CO2?

Answer 14

5.1atm

Question 15

At what temperature and pressure does the critical point of CO2 occur?

Answer 15

31°C and 72.8atm