Enthalpy of Vaporization of Toluene by Gas Chromatography
Adapted from Herbert R. Ellison, Journal of Chemical Education, 82, 1086 -1088, 2005
The enthalpy of vaporization can be measured calorimetrically, a laborious process, and
Chapter 14: Supplementary Problems
S14-1. (a) Identify the oxidizing and reducing agents among the reactants below and write a balanced
half-reaction for each.
2S O2- + TeO2- + 2OH4SO2- + Te(s) + H O
(b) How many c
CHAPTER 15: SUPPLEMENTARY PROBLEMS
ELECTRODES AND POTENTIOMETRY
S15-1. Convert the potentials listed below. The Ag | AgCl and calomel reference electrodes are
saturated with KCl.
(d) 0.035 vs Ag | AgCl = ? vs S.C.E.
(a) 0.222 vs S.H.E. = ? vs Ag | AgCl
CHAPTER 23: SUPPLEMENTARY PROBLEMS
INTRODUCTION TO ANALYTICAL SEPARATIONS
S23-1. (a) What volume of chloroform is needed to extract 99.5% of a solute from 100 mL of water,
if the partition coefficient is CCHCl3/CH2O = 610?
(b) What will be the total vo
CHAPTER 24: SUPPLEMENTARY PROBLEMS
S24-1. Retention times in a gas chromatogram are 1.21 min for CH4, 7.33 min for hexane, 7.66 min
for unknown, and 8.41 min for heptane. Find the Kovats retention index for the unknown.
CHAPTER 25: SUPPLEMENTARY PROBLEMS
Compounds C and D gave the following HPLC results:
Peak area (cm2)
A solution was prepared by mixing 1.23 mg of D in 5.00 mL
CHAPTER 26: SUPPLEMENTARY PROBLEMS
CHROMATOGRAPHIC METHODS AND CAPILLARY ELECTROPHORESIS
S26-1. A gel-filtration column has a radius (r) of 1.27 cm and a length (l) of 28.4 cm. Blue Dextran
was eluted at a void volume of 43.4 mL and a solute was elute