ambient [ 16 , 17 ] and at low temperature [ 18 ] and at high pressures [ 19 ]; however, no solid–solid phase transition has been detected.
Earlier heatcapacities of samples of l -cysteine and l -cystine were measured in the temperature range
The heats of solution of tetrabutylammonium bromide have been measured in mixtures of formamide (FA) with methanol (MeOH)
and ethylene glycol (EG) at 313.15 K by calorimetric method. The standard enthalpies of solution in binary mixtures have been
extrapolated to infinite dilution by Redlich–Rosenfeld–Meyer type equation using the literary data at 298.15 K and the present
paper data at 313.15 K. The Debye–Hückel limiting law slope AH required for calculation of the ∆solH0 value has been obtained with application the new additive scheme of determination of the physic-chemical characteristics
of binaries. The scheme is tested on the example of Bu4NBr solutions in FA–MeOH mixture at 298.15 K. Its application yields the ∆solH0 value very closed on the ones determined with the real (non-additive) characteristics of binaries. The standard enthalpies
of solution extrapolated by Redlich–Rosenfeld–Meyer type equation are in a good agreement with the ones computed in terms
of the Debye–Hückel theory in the second approximation. The heat capacities characteristics of Bu4NBr have been calculated in H2O–FA, MeOH–FA and EG–FA mixtures using the literary and present data. The sequence of solvents H2O > FA > EG > MeOH located on their ability to solvophobic solvation found by us earlier for enthalpic characteristics is
confirmed by the ∆Cp0 values. The comparison of thermochemical characteristics of Bu4NBr solutions in aqueous and non-aqueous mixtures containing FA has been carried out. The own structure of water remains in
the region of small additions of formamide to co-solvents. It considerably differs the H2O–FA mixture from the investigated non-aqueous systems.
by transient heat transfer equation with convective term
where λ = λ ( T ) is thermal conductivity dependent on temperature, C ef is effective heatcapacity, is a volumetric heat source and v = v (x,y,z, t ) is a vector determined by
diversified than those in which simpler molecules take part. The results of heatcapacity measurements of alkanediol in methanol made it possible to determine the molar heatcapacity of the interaction between alkanediol molecule and methanol, Δ C p(int) [ 15
has been modified by a device, which sends fake temperature data from the tested room. The thermodynamic properties and the control method are described in the followings. 2.1 Heatcapacity and heat resistance A building, which has been built by
fluid ( bf ) and Tungsten oxide WO 3 nanoparticle subscribed by ( np ) to define the density ( ρ ), specific heatcapacity ( C p ), thermal conductivity ( k ) and dynamic viscosity ( μ ) that lead enhancement in the thermal efficiency. The effect of
. 2 below its base line. This is reasonable considering the large heatcapacity of H 2 O.
The measurements in Fig. 3 (maximum TMA pulse) were recorded after the campaign in Fig. 2 (maximum H 2 O pulse). By comparing the magnitude of the
for NaI–non-electrolyte pairs in water, and the heatcapacity of interactions, C p (int) between the non-electrolyte Y and solvent water [ 7 ] (Fig. 2 ). Similar correlations were obtained when the NaI was replaced by NaCl, or by polar non