A simple, flexible, low cost, computer controlled laboratory scale reaction calorimeter has been assembled using commercially available components. The calorimeter may be used for research, routine analysis and teaching. It has been used, operating in the isoperibolic mode, to study the hydrolysis of acetic anhydride in relatively dilute solution (~0,5 M with respect to acetic anhydride) in the temperature range 5 – 40°C. A small enthalpy of mixing has been observed. This is exothermic at the lower temperatures and becomes endothermic at higher temperatures. The second order reaction rate constant has been derived from the heat flow measuraments assuming pseudofirst order kinetics and it is in good agreement with values reported in the literature.
Studio dell'idrolisi dell'anidride acetica utilizzando un sistema calorimetrico semplice e a basso costo
MASCHIO, GIUSEPPE;
2001
Abstract
A simple, flexible, low cost, computer controlled laboratory scale reaction calorimeter has been assembled using commercially available components. The calorimeter may be used for research, routine analysis and teaching. It has been used, operating in the isoperibolic mode, to study the hydrolysis of acetic anhydride in relatively dilute solution (~0,5 M with respect to acetic anhydride) in the temperature range 5 – 40°C. A small enthalpy of mixing has been observed. This is exothermic at the lower temperatures and becomes endothermic at higher temperatures. The second order reaction rate constant has been derived from the heat flow measuraments assuming pseudofirst order kinetics and it is in good agreement with values reported in the literature.Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
