|
authors |
Antunes, BM; Cardoso, SP; Silva, CM; Portugal, I |
|
nationality |
International |
|
journal |
JOURNAL OF CHEMICAL EDUCATION |
|
author keywords |
Upper-Division Undergraduate; Chemical Engineering; Laboratory Instruction; Physical Chemistry; Computer-Based Learning; Hands-On Learning/Manipulatives; Equilibrium; Esters; Kinetics; Laboratory Equipment/Apparatus |
|
keywords |
ACETIC-ACID; ESTERIFICATION |
|
abstract |
A low-cost experiment to carry out the second-order reversible reaction of acetic acid esterification with ethanol to produce ethyl acetate is presented to illustrate concepts of kinetics and reactor modeling. The reaction is performed in a batch reactor, and the acetic acid concentration is measured by acid-base titration versus time. The experimental data are used to optimize the specific rate constant of the direct reaction, which is the unique parameter of the model; the rate constant for the inverse reaction is expressed in terms of the equilibrium constant. Good representations are generally obtained: the absolute average relative deviation found in this work is only 2.86%. After the experiment, students may carry out simulations for distinct operating conditions. The experimental data for short times are also analyzed approximately by using the classical approach for irreversible second-order reactions. |
|
publisher |
AMER CHEMICAL SOC |
|
issn |
0021-9584 |
|
year published |
2011 |
|
volume |
88 |
|
issue |
8 |
|
beginning page |
1178 |
|
ending page |
1181 |
|
digital object identifier (doi) |
10.1021/ed100471j |
|
web of science category |
Chemistry, Multidisciplinary; Education, Scientific Disciplines |
|
subject category |
Chemistry; Education & Educational Research |
|
unique article identifier |
WOS:000293049700037
|
