{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

LEC 05 CHAP 12

# LEC 05 CHAP 12 - Lecture 5 Phase Diagrams and their...

This preview shows pages 1–5. Sign up to view the full content.

TOUPADAKIS Lecture Slide 1 of 35 Lecture 5 Phase Diagrams and their Features. The Phase Diagrams of H 2 O and CO 2 . Types of Structures. Crystal Structure. Seven Crystal Systems or Shapes of Unit Cells. Cubic Unit Cell. Three Forms of Cubic Unit Cell. Occupancy. The Crystal Structure of Sodium Chloride. Atomic Radii from Crystal Structures. Types of Crystalline Solids and Bonding. Lattice energy.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
TOUPADAKIS Lecture Slide 2 of 35 Phase Diagrams A Phase Diagram is a plot showing the effects of external pressure and temperature on the physical state of a substance.
TOUPADAKIS Lecture Slide 3 of 35 Features of a Phase Diagram (1) The pressure shown in the phase diagram is either the pressure generated by the system itself or the external pressure applied to the system. Vapor-Pressure Curve of the solid: represents the equilibrium between the solid and gas phase. Generally as temperature increases, the vapor- pressure of the solid increases. Vapor-Pressure Curve of the liquid: represents the equilibrium between the liquid and gas phase. Generally as temperature increases, the vapor- pressure of the liquid increases. Melting Point Curve of the solid : represents the equilibrium between the solid and liquid phase. If the solid is more dense than the liquid (carbon dioxide), then as the external pressure increases, the melting point increases and the solid phase is favored. If the solid is less dense than the liquid (water), then as the external pressure increases, the melting point decreases and the liquid phase is favored.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
TOUPADAKIS Lecture Slide 4 of 35 Features of a Phase Diagram (2) Triple Point: temperature and external pressure at which all three states of matter (solid, liquid, and gas) of a substance are in equilibrium.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern