Heat capacity of MgSiN2 between 8 and 800 K

Article Abstract:

The specific heat at standard pressure of MgSiN2 was determined by adiabatic calorimetry in the range of 8-400 K and differential scanning calorimetry in the range of 300-800 K. Findings show that the standard pressure data of MgSiN2 were about a factor 2 larger than those of AIN. The entropy, enthalpy and the energy function in the range of 0-800 were calculated using standard thermodynamic formulas. Standard enthalpy was estimated to equal -534 kJ mol-1 by extrapolating the standard pressure data to high temperatures at which the energy function is known.

Methods, Usage, Temperature measurements, Temperature measurement, Ceramics, Calorimetry, Thermal analysis, Ceramic materials

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Kinetic and thermodynamic information derived from electrochemical measurements on stationary states

Article Abstract:

The electrochemical displacement of the nonlinear minimum bromate reaction from stationary states far from equilibrium and from equilibrium were experimentally investigated. The Ce(IV)/Ce(III) electrode potential V was measured at a given displacement induced by an imposed current clamp, I. The variation of the excess power (V - Vs)/I, where Vs is the electrode potential at a stationary state, compared to the imposed current was of the same form as the time derivative of an excess work related to the thermodynamics of systems far from equilibrium.

Electrochemistry, Chemical reactions

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