1. ChemDuino-Calorimetry to determine the enthalpy change of neutralization of an acid−base reaction: Making a familiar experiment "greener".
- Author
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Prabowo, N. Krisnu, Paristiowati, M., Irwanto, Afrizal, and Yusmaniar
- Subjects
ENTHALPY ,THERMOCHEMISTRY ,SUSTAINABLE chemistry ,STANDARD deviations ,MICROCONTROLLERS ,THERMOMETERS - Abstract
In thermochemistry experiments, a large volume and relatively high concentration of chemicals are often used to get a significant temperature change using an analogue thermometer. A 'greener' experimental protocol is developed as an alternative using modern microcontroller boards, ChemDuino. The aim of this research is to develop a low-cost and pocket-sized prototype for measuring temperature of solutions using Arduino Uno R3 DIP and DS18B20 sensor based on green chemistry and DIY (do-it –yourself) methods. The construction of ChemDuino for temperature sensing is made in the simplest manner for individuals with little knowledge of electronics. The details of all components are stipulated in this paper. This research was conducted in three phases, which includes preliminary, prototype development, and assessment phase. The device is used to determine the enthalpy change of neutralization (ΔH) of NaOH and HCƖ solution. The enthalpy change of neutralization, kJ mol
−1 at 25.0 °C from literature is −57.13 kJ mol−1 , whereas the enthalpy change of neutralization, kJ mol−1 at 25.0 °C from the experiment using ChemDuino-Calorimetry is −56.87 (±1.9) kJ mol−1 (average of seven determinations and estimated standard deviation). The device has successfully measured the temperature change of the reaction at a relatively lower concentration. ChemDuino-Calorimetry has a great potential, because of its reliability and accuracy in measurements, inexpensive setup, and interconnectivity. [ABSTRACT FROM AUTHOR]- Published
- 2023
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