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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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TL;DR: In this paper, a small sample precision automated adiabatic calorimeter over the temperature range from 80 to 330 K was used to precisely measure the heat capacity of acetaminophen.
Abstract: Molar heat capacities of acetaminophen were precisely measured with a small sample precision automated adiabatic calorimeter over the temperature range from 80 to 330 K. A solid-solid transition at 149.96 K was found from the Cp,m-T curve. The polynomial functions of Cp,.m(J K-1 mol-1) vs. T were established on the heat capacity measurements by means of the least square fitting method.
30 citations
TL;DR: The advantages and disadvantages of the kinetic calorimeter are now obvious as discussed by the authors, and they can be summarized as follows: (1) the possibility of measuring the rate of a chemical reaction without any special requirements being imposed on the reaction medium (solid, viscous, multicomponent systems); (2) the high efficiency: a large volume of kinetic information in one experiment and a non-destructive character of changes; (3) the possible of measuring directly in the field of ionizing radiation (γ-radiation, accelerated electrons) and light; and (4)
Abstract: Chemical reactions are always followed by a change in the reacting system enthalpy, hence, calorimetry as a method of enthalpy and heat capacity measuring is a universal and, sometimes, even the only possible way of studying chemical reaction kinetics. Throughout its long history, the calorimeter, having preserved the positions of the main method of thermodynamic studies, has conquered a new field of application: that of kinetic study of chemical reactions. The advantages and disadvantages of the kinetic calorimeter are now obvious. First, the advantages are: (1) the possibility of measuring the rate of a chemical reaction without any special requirements being imposed on the reaction medium (solid, viscous, multicomponent systems); (2) the high efficiency: a large volume of kinetic information in one experiment and a non-destructive character of changes; (3) the possibility of measuring directly in the field of ionizing radiation (γ-radiation, accelerated electrons) and light; and (4) recording ...
29 citations
TL;DR: In this paper, the A to nematic transition of biphenyles fulfils the conditions required for verifying the symmetry of the temperature calibration in heating and cooling modes at at least one temperature.
29 citations
TL;DR: In this article, the enthalpy of combustion of ultra-high purity methane at 25°C was measured using a constant-pressure gas burning calorimeter, based on the design of those used in the previous studies, and the use of modern equipment and automatic data collection leads to a value, traceable to national standards, of 890.61 kJ-mol−1 with a combined standard uncertainty of 0.21 kJ−1.
29 citations
29 citations