Please answer all questions.

1			Which of the following best describes the bonding between atoms in metals.
			A)	the transfer of electrons from one atom to another, producing charges which then interact with each other
			B)	by sharing pairs of electrons with adjacent atoms
			C)	by fusing the atomic nuclei to produce a continuous malleable array
			D)	the valence electrons of a given metal atom are delocalized over all of the atoms in the piece of metal
			E)	the fusion of the protons, neutrons and electrons to form a hard solid mass
2			Butter, like glass, melts over a range of temperatures, rather than with a sharp melting point. Butter might be classified as a/an:
			A)	covalent solid
			B)	ionic crystal
			C)	metallic crystal
			D)	amorphous solid
			E)	molecular crystal
3			The boiling point of a substance is most strongly influenced by:
			A)	the molecular weight of a substance
			B)	the specific heat of the substance
			C)	the melting point
			D)	the strength/weakness of the intermolecular forces
			E)	the amount of the substance involved
4			Viscosity of liquids typically increases when which of the following is considered, except:
			A)	the temperature is increased
			B)	compounds with ionic bonds are involved
			C)	substances that can hydrogen bond are used
			D)	longer molecules are used
			E)	compounds with greater molecular weights are used
5			All of the following are intermolecular forces except:
			A)	dipole-dipole interactions
			B)	London forces
			C)	covalent forces
			D)	van der Waals forces
6			Which one of the following is not an example of a covalent network solid?
			A)	diamond
			B)	SiO2
			C)	Ge
			D)	graphite
			E)	none of the above
7			Calculate the amount of heat necessary to raise the temperature of 8.5 kg of water from 12.5°C to 84°C
			A)	2.99 x 103 kJ
			B)	35.56 J
			C)	2.54 x 103 kJ
			D)	2.54 x 106 kJ
			E)	254 kJ
8			Which of the following molecules would have hydrogen bonding?
			A)	HF
			B)	CH4
			C)	H2S
			D)	CH3CH3
			E)	C5H12
9			The relatively high boiling point of water can be attributed to which type of bonding?
			A)	Dipolar
			B)	Hydrogen bonding
			C)	van der Waals
			D)	Ionic
			E)	Polar
10			KCl is considered what kind of solid?
			A)	Molecular
			B)	Network
			C)	Ionic
			D)	Metallic
			E)	Macromolecular
11			A bar of copper is considered what kind of solid?
			A)	Ionic
			B)	Network
			C)	Molecular
			D)	Metallic
			E)	Macromolecule
12			Amorphous solids are characterized by:
			A)	Having a definite melting point
			B)	Softer as temperature is raised
			C)	Being square
			D)	Changing shape
			E)	Being layered
13			NaF is considered what kind of solid?
			A)	Molecular
			B)	Ionic
			C)	Network
			D)	Metallic
			E)	Macromolecular
14			The term that describes when the rate of evaporation equals the rate of condensation is
			A)	Distillation
			B)	Density
			C)	Vapor pressure
			D)	Physical equilibrium
			E)	Boiling point
15			Which of the following is not considered a phase change?
			A)	Boiling liquid CH4
			B)	Melting solid CH4
			C)	Burning CH4
			D)	Freezing CH4
			E)	Condensing CH4
16			Solid CO2 becomes a gas at room temperature. This process is called:
			A)	deposition
			B)	sublimation
			C)	evaporation
			D)	condensation
			E)	none of the above
17			Which of the following statements is NOT true?
			A)	When water freezes, the volume increases and thus the density decreases.
			B)	When water freezes, the volume decreases and thus the density increases.
			C)	When water freezes, the volume decreases and thus the density decreases.
			D)	When water freezes, the volume increases and thus the density increases.
18			Calculate the energy required to turn 100. g of water at 50.°C into steam at 100.°C.
			A)	247 kJ
			B)	62 kJ
			C)	247 J
			D)	620 kJ