The critical temperature is the highest temperature at which a distinct liquid phase can form. It is the highest temperature at which a liquid can exist. Non-polar substances with weak intermolecular forces have lower critical temperatures. The vapor pressure of a liquid increases nonlinearly with increasing temperature. Viscosity increases as temperature decreases, molecular weight increases, and intermolecular forces increase.

1. KEY
GENERAL CHEMISTRY-II (1412)
S.I. # 7
1. Define Critical temperature:
The highest temperature at which a distinct liquid phase can form is referred to as
the critical temperature. It is the highest temperature at which a liquid can exist. Non-
polar, low molecular weight substances with weak intermolecular attractions have low
critical temperatures.
2. The Vapor Pressure of a liquid_____B_____.
A) increases linearly with increasing temperature
B) increases nonlinearly with increasing temperature
C) decreases linearly with increasing temperature
D) decreases nonlinearly with increasing temperature
E) is totally unrelated to its molecular structure
3. Define hydration.
When solutions of strong electrolytes in water are formed, the ions are surrounded by
water molecules.
4. Define a strong electrolyte:
A strong electrolyte ionizes completely in solution.
5. The process of a substance sticking to the surface of another is called:
ADSORPTION
6. Define Surface Tension:
Surface Tension is the energy required to expand the surface area of a liquid by a
unit amount of area.

2. KEY
7. How do temperature, molecular weight and intermolecular forces interact with
the viscosity of a molecule?
Viscosity increases as temperature decreases
Viscosity increases as molecular weight increases
Viscosity increases as intermolecular forces increase.
NOMENCLATURE!!!
1. CCl4 Carbontetrachloride
2. CaH2 Calcium hydride
3. C6H12O6 Glucose
4. Ammonium chloride NH4Cl
5. Methanol CH3OH
6. ClO2 (g) Chlorine dioxide gas
7. CH3Cl Methyl chloride
8. Acetaldehyde C2H4O
9. Propane C3H8
10. CH3I Methyl Iodide
11. Hydrazine H4N2
12. Methyl Flouride CH3F
13. H2S Hydrogen sulfide
14. PH3 Phosphine
15. H2O2 Hydrogen peroxide
16. Acetone C3H6O
17. Ethanol CH3CH2OH
18. HCl (aq) Hydrochloric Acid
19. C3H8O3 Glycerol
20. CHCl3 Chloroform