Construction and Operation of a Solution Calorimeter

Modification of a Solution Calorimeter for Thermometric Titrations

“…Simple removal of the titrant delivery system converts the instrument back to its use as a solution calorimeter. Thus the reactant can be added on a volume basis, injected by syringe, or by breaking of a small thin-walled glass bubble [6], Gaseous, liquid (solution), and solid samples can be added with an expected accuracy and precision of 1-3% when the temperature change for the system is in the order of 0.l-0.4°C. Obviously, the heat of reaction, change in heat capacity, concentration of reagents, and recorder sensitivity will control the accuracy and precision.…”

“…A basic schematic and wiring diagram of the calorimeter has been described before [5,6]. Modifications in the titration cell lid were needed to accommodate titrant delivery.…”

“…The base line is reestablished and the calories of heat energy introduced is calculated [ 6]. Repositioning of the recorder pen according to whether the reaction being measured is endothermic or exothermic is done instrumentally, a base line is established, and the titrant and clock are turned on simultaneously while carefully marking the start on the recorder trace.…”

“…The design of this solution calorimeter, which can be assembled at modest cost, was such that it would handle solid, liquid, and gaseous samples conveniently with good precision and accuracy [6]. In this communication the versatility of the calorimeter is further demonstrated by its modification for thermometric titrations.…”