Heat Capacity of Selected Solids

Heat Capacity of Selected Solids, 12-200 Heat Capacity of the Elements at 25 C, 4-135 Heat conductivity see Thermal conductivity Heat of Combustion, 5-70 Heat of dilution see Enthalpy of dilution Heat of formation see Enthalpy of formation Heat of fusion see Enthalpy of fusion Heat of solution see Enthalpy of solution Heat of vaporization see Enthalpy of vaporization Hebrew alphabet, 2-36 Helium see also Elements... 

Constant volume heat capacities for liquid oiganic compounds were estimated with a four parameter fit (219). A 1.3% average absolute error for 31 selected species was reported. A group contribution method for heat capacities of pure solids and liquids based on elemental composition has also been provided (159). 

Heat capacity measurements for Ni(N03)2-6H20(cr) were reported by Vasileff and Grayson-Smith [50VAS/GRA] for temperatures from 65 to 300 K. The authors estimated the entropy change between 65 and 273 K to be 364.4 J K -mol (87.1 cal K mor ). From the set of smoothed specific heats, the selected value of the molar heat capacity of the solid at 298.15 K is calculated to be... 

CrCl2 molecules have been isolated in solid inert-gas matrices and their i.r. spectrum has been recorded 33—1000 cm The isotopic shifts and i.r. selection rules indicate a linear 10°) structure. The d-d spectrum of gaseous CrClj has been discussed in terms of ligand field theory.The heat capacity of anhydrous CrCl3 in the temperature interval 2—20 K has been determined and the sublimation and decomposition pressures of the compound have been recorded. ... 

If we want to calculate the entropy of a liquid, a gas, or a solid phase other than the most stable phase at T =0, we have to add in the entropy of all phase transitions between T = 0 and the temperature of interest (Fig. 7.11). Those entropies of transition are calculated from Eq. 5 or 6. For instance, if we wanted the entropy of water at 25°C, we would measure the heat capacity of ice from T = 0 (or as close to it as we can get), up to T = 273.15 K, determine the entropy of fusion at that temperature from the enthalpy of fusion, then measure the heat capacity of liquid water from T = 273.15 K up to T = 298.15 K. Table 7.3 gives selected values of the standard molar entropy, 5m°, the molar entropy of the pure substance at 1 bar. Note that all the values in the table refer to 298 K. They are all positive, which is consistent with all substances being more disordered at 298 K than at T = 0. 

The low-temperature heat capacity of solid MnSe was measured in the temperature range 54 to 287 K by Kelley [39KEL]. A pronounced peak centred around 247 K apparently corresponds to the 5 a transition. The heat capacity determined at 298.15 K is selected ... 

Figure V-53 The standard molar heat capacity of Ni2Si04-olivine as a function of temperature. The data are taken from [84ROB/HEM] (O) and [65EGO/SMI] (A). The fitted ciuv e (solid line) corresponds to the thermal heat capacity function selected in this review.

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