CAS CH 102 Lecture Notes - Lecture 1: Joule

• School: Boston University
• Department: Chemistry
• Course: CAS CH 102
• Professor: Thomas Tullius

Document Summary

Coloumb potential hold electrons and protons together in atoms, It holds atoms together in molecules via chemical bonds and hold. Molecules very close together in liquids and solids via attractive. Without attractive forces, everything is a gas (molecules are. Very far aprar,t not dense or compact like in solids) Attractive forces determine the phase (s,g, l) at a specified temp. Atoms and molecules are held together by the attraction of. Force points in the direction of decreasing ep. Solid- ordered lattice, fixed shape and volume. Liquid- fills container, fixed volume, no def shape. Gas- fills container, no def shape or volume (takes it of the container) Density- distinguises the phases of matter and closeness of. Molecules (s=most dense, gas = least dense @ 1 atm 0c) Liquid gas requires the most amount of energy to occur. Hfus and hvap = heats needed to melt and boil 1 mol at a constant temp and pressure.