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CHM 2046C: Spring Term 2008
Practice Final (Fall 1997's Test)
Module Seven (Chapter 14)

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Module Seven II (Chapter 14)

Module 7 II Test Masters:

John Taylor (jtaylor@hcc.cc.fl.us) [Consultant]


Multiple Choice [One Answer Only]


Question 1

Which one of the following is an exothermic process?

a) melting
b) subliming
c) freezing
d) boiling
e) none of the above

Question 2

For a given substance, which is generally larger?

a) ∆H fusion
b) ∆H vaporization

Question 3

The curve below was generated by measuring the heat flow and temperature of a solid as it was heated. The slope of which portion of this curve corresponds to the heat capacity of the liquid of that substance?

a) A
b) B
c) C -
d) D
e) E

Question 4

The curve below was generated by measuring the heat flow and temperature of a solid as it was heated. The heat flow into the sample under which part of the curve corresponds to ∆Hvaporizationof the substance?

a) A
b) B
c) C
d) D
e) E

Question 5

The vapor pressure of a liquid

a) increases linearly with increasing temperature
b) increases non linearly with increasing temperature
c) decreases linearly with increasing temperature
d) decreases non linearly with increasing temperature
e) is totally unrelated to its molecular structure

Question 6

The enthalpy of fusion of water is 6.0 kJ/mol and the heat capacity is 75 J/mol·oC. How many kJ of heat would it take to convert 50 g of ice at 0oC to liquid water at 22oC?

a) 3.8 X 102
b) 21
c) 17
d) 0.46
e) none of the above

Question 7

Which one of the following properties of a liquid is not affected by an increase in inter molecular forces?

a) viscosity
b) molecular weight
c) heat of vaporization
d) boiling point

Question 8

On the diagram below, which curve corresponds to the conditions of temperature and pressure under which the solid and the gas of the substance are in equilibrium?

a) A
b) B
c) C
d) D
e) E
f) F

Question 9

On the diagram below, the coordinates of point correspond to the critical temperature and pressure.

a) A
b) B
c) C
d) D
e) E
f) F

Question 10

A Substance whose triple point occurs at 222 K and 3.93 atm

a) will melt rather than sublime under normal ambient conditions
b) will have critical point of 211 K and 2.93 atm
c) will have critical point of 233 K and 2.93 atm
d) will sublime rather than melt under normal ambient conditions
e) will not have a critical point

Question 11

What is the normal boiling point of this substance?

a) 10oC
b) 20oC
c) 30oC
d) 40oC

Question 12

Hydrogen bonding is a special case of

a) London-dispersion forces
b) ion-dipole attraction
c) dipole-dipole attraction
d) none of these <





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