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Calorimeter

About: Calorimeter is a research topic. Over the lifetime, 5878 publications have been published within this topic receiving 77157 citations.


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Journal ArticleDOI
TL;DR: In this paper, a flow calorimeter has been used to measure the heat capacities of aqueous sodium sulfate solutions from 30 to 200/sup 0/C at 1 bar, or the saturated vapor pressure, and at 200 bar.
Abstract: A flow calorimeter has been used to measure the heat capacities of aqueous sodium sulfate solutions from 30 to 200/sup 0/C at 1 bar, or the saturated vapor pressure, and at 200 bar. The heat-capacity data have been integrated as a function of temperature to obtain values of the apparent molal enthalpy, the osmotic coefficient, and the mean activity coefficient. Osmotic coefficients obtained in this manner are in good agreement with available literature data over the entire temperature range. These results indicate that heat-capacity measurements can be used reliably to obtain the high-temperature activity properties of electrolyte solutions, provided the enthalpy and Gibbs energy are known at 25/sup 0/C.

107 citations

Journal ArticleDOI
TL;DR: In this article, the temperature windows-to-operate of the Flash DSC 1 has been determined for unloaded sensors under various conditions like purge gas and flow rate variations; cooling to −90°C and heating to 450°C; scan rates from 1 up to 20,000°C−s−1 in heating and 15,000−°C −s− 1 in cooling.
Abstract: For the new Flash DSC 1, the temperature windows-to-operate—the temperature ranges where the real, achieved scan rate is constant—have been determined for unloaded sensors under various conditions like purge gas and flow rate variations; cooling to −90 °C and heating to 450 °C; scan rates from 1 up to 20,000 °C s−1 in heating and 15,000 °C s−1 in cooling. Compared to nitrogen, helium purge gas offers better access to low-temperature transitions and enables faster cooling. Drawback is the decreased temperature window-to-operate in heating at the high-temperature side. The temperature calibration protocol according to the recent DIN SPEC 91127 for sample mass and scan rate was found to be useful. The correction factors are maximal −1.4 °C as measured for 1 μg at 1,000 °C s−1 heating. Using liquid crystalline substances it was proved that the Flash DSC 1 has symmetry, meaning that calibration data found in heating also can be applied in cooling.

107 citations

Journal ArticleDOI
TL;DR: In this paper, the energy resolution and response of a segmented iron-scintillator total absorption calorimeter have been measured for pion energies from 10 to 140 GeV and for electron energies up to 50 GeV.

106 citations

Journal ArticleDOI
TL;DR: In this paper, the authors modified their earlier technique for accurate PPMS heat capacity measurements on powdered samples by means of applying Wakefield grease or small copper strips in the sample preparation instead of using Apiezon N high-vacuum grease.

105 citations

Journal ArticleDOI
TL;DR: In this article, the determination of equilibrium constants and enthalpy change values from titration calorimetry data has been demonstrated for three chemical systems and the computational methods outlined in the previous papers of this series can be used to calculate the heat, Qc, produced, due to the reaction(s) of interest and from these Qc values the K and ΔDH values can be calculated for the interactions occuring in the calorimeter.

102 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20224
202193
2020142
2019113
2018150
2017160