Title: Enthalpy increment and heat capacity of Pb3Bi
Abstract: Enthalpy increments of Pb0.71Bi0.29 compound and enthalpy change associated with peritectic decomposition reaction of the compound were determined using high temperature Calvet calorimeter. The heat capacity of the compound was determined in the temperature range 230–440 K using heat flow DSC. The enthalpy increment data was fitted into the following polynomial equations.ΔH298.15KT(J/mol)=−6492.2+21.2775T+0.00919T2−199,341T(298.15–457K)The enthalpy of decomposition reaction of the compound at the peritectic temperature, 457 K, was found to be 984 J/mol. The heat capacity of the compound determined using DSC was fitted into the following polynomial equation.CP(J/molK)=23.486−0.01482T+97,338.4T2(228–457K)The heat capacity values obtained from DSC were in reasonably good agreement with the values calculated from enthalpy increment equation and both were slightly higher than the heat capacity values calculated using Neumann–Kopp's rule.
Publication Year: 2010
Publication Date: 2010-10-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 6
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