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Introduction to Physical Chemistry 15
10. From the values of rn and c, determine the unknown para-
meter( s).
11. Answer any riders to the question.

In Chapter 9 on Chemical Kinetics, a worked example on graphical
problems will be considered, using the above working method.

CONCLUSION
In Chapter 1, some of the basic concepts of physical chemistry are
introduced, as well as the systematic step-by-step working methods
which should be used where appropriate to tackle numerical or
graphical problems in physical chemistry.

MULTIPLE-CHOICE TEST
1. Charles's Law states that:
(a) V = kn (b) Vocp (c) V = kT (d)pV = nRT
2. Which of the following statements is incorrect?
(a) The conjugate base of CH3C02H is CH3C0,;
(b) A concentrated acid is an acid which is dissociated comple-
tely in solution;
(c) H2C2O4, ethanedioic acid, is an example of a diprotic acid;
(d) Avogadro's Law states that equal volumes of gases measured
at the same temperature and pressure contain equal number
of molecules.
3. The volume of a sample of carbon monoxide, CO, is 325 cm3 at
15 bar and 520 K. What is the volume of the gas at 3.92 bar and
520 K?
(a) 12.4 dm3 (b) 0.00124 dm3 (c) 1244 dm3 (d) 1.24 dm3
4, How many of the following statements are incorrect?
* The pH of a 0.08 M solution of HC104 is 1.10 M.
* Standard state conditions are 298 K and 1 bar pressure.
* 1 bar = lo5 Pa.
* The kinetic theory of gases is valid at high pressure.
(a) 1 (b) 2 (c) 3 (d) All 4
5. What is the density of C2Hqgl at 175 kPa and 20 "C?
(C, 12.01, H, 1.01; R = 8.314 J K-' mol-' = 0.08314 dm3 bar
K-' mol-')