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CHEM110 Introductory Chemistry

Intermol. Forces Liq. / Solids
Properties of liquids

1)What are the properties of liquids. Briefly explain of define each property.

2)What is the difference between cohesive force and adhesive force? Draw and label sketches to show the difference. Give an example of a substance in each group.

3)Order the liquids below from the one that will climb the most up a glass tube to the one that will climb the least up a glass tube:

Hexane, Hydrochloric acid, Hexane, Mercury and Water.

4)Rank the viscosity of the liquids below from low to high:

Benzene, Ethanol, Glycerin, Sodium chloride (liquid), and Water.

Intermolecular Forces

5a)What are intermolecular forces?

5b)Describe each type of intermolecular forces and give an example.

6)What are all the intermolecular forces involved in each set below and what is the dominate intermolecular force in each set below?

6a)Salt (NaCl) water

6b)Ne dissolved in liquid ammonia

6c)Hexane (C6H14) mixed with benzene (C6H6)

6d)Chloroform (CHCl3) in ethanol (CH3CH2OH).

7)Explain why ammonia (NH3) can form hydrogen bonds, but hydrochloric acid (HCl) cannot, given that nitrogen and chlorine have the same electronegativity.

8a)What do you understand by the boiling point of a compound?

8b) What do you understand by the melting point of a compound?

8c)Order the following compounds from lowest boiling point to highest boiling point:

H2O, PH3, H2S, CH4, and NH3.

9a)What are the properties of solids. Briefly explain of define each property10b)What is the difference between crystalline, polycrystalline and amorphous solids?

9c)Compare and contrast the different types of crystalline solids.

10)Explain why metals are magnetic and network atomic solids are insulators12)What is a semiconductor? What is doping and how does it affect the conductivity?11a)Explain or define the term vapor pressure.

Vapor Pressure

12b)What is the boiling point of ether?

13)Ethanol boils at 78.37 °C atmospheric pressure. At 19.0 °C, ethanol has a vapor pressure of 40.0 torr. What is the heat of vaporization of ethanol?


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