Exam 1

Question 1

Surface Tension + IMF Correlation

Answer 1

Tendency of liquids to minimize surface area
Surface tension decreases as IMF’s decrease

Question 2

Viscosity + Imf and temp relation

Answer 2

resistance of a liquid to flow (maple syrup is more viscous that water)
Higher the Viscosity, higher the iMF
As temp increases, viscosity decreases,

Question 3

Capillary Action

Answer 3

ability of a liquid to flow against gravity up a narrow tube

Question 4

Properties of liquid solid and gas

Answer 4

State Density Shape Volume IMF
Gas Low Indef Indef Weak
Liquid High Indef Def Moderate
Solid High Def Def Srong

Question 5

Sublimation

Answer 5

Solid to gas

Question 6

Fusion

Answer 6

Solid to liquid

Question 7

IMF vs Boiling Point and and Vapor Pressure with Temp

Answer 7

The stronger the IMF higher the boiling point
Stronger the IMF the lower the vapor pressure. Directly proportional to temp, as temp increases vp increases vice versa

Question 8

Phase diagram + names and transition

Question 9

Types of Crystals

Answer 9

Atomic solids- solids whose units are atoms, (Iron, silicon dioxide)
Non-bonding Atomic solids- held together by weak dispersion forces
Network covalent solids- atomic solids held together by covalent bonds, (diamond ,graphite)
Mettalic atomic solids- atomic solids held togerther by metallic bonds (iron, gold)

Question 10

Identify which IMF is present based on structure (dispersion, dipole-dipole, hydrogen, ion-dipole)
1. HBr (H-Br)
2. CH3NH2
3. KI+ H20
4.C6H6
5. Br2
6. Ch3-C-H
7. CH2Cl2

Answer 10

1. Dipole
2. H bond
3. Ion Dipole (KI ionic,H Polar)
4. Dispersion (nonpolar)
5. Dispersion
6. dipole-dipole (polar because nonsymmetrical)
7. dipole-dipole