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<p>In the present study, we present the experimental investigation on thermochemical stability of five compounds in Cu–V–O ternary system i.e., CuV<sub>2</sub>O<sub>6</sub>(s), Cu<sub>2</sub>V<sub>2</sub>O<sub>7</sub>(s), Cu<sub>3</sub>V<sub>2</sub>O<sub>8</sub>(s), Cu<sub>5</sub>V<sub>2</sub>O<sub>10</sub>(s) and Cu<sub>11</sub>V<sub>6</sub>O<sub>26</sub>(s). The molar heat capacity of these compounds was determined in the temperature range 2–770&#xa0;K employing relaxation calorimetry in conjuction with differential scanning calorimetry. The standard molar entropies of formation of the compounds were determined by low temperature heat capacity measurements from 2 to 300&#xa0;K using relaxation calorimetry. A high temperature oxide melt solution calorimeter was employed to determine the standard molar enthalpy of dissolution of these compounds in sodium molybdate solvent. Using the experimentally obtained thermochemical data, the standard molar enthalpy of formation of these compounds were derived.</p>

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Calorimetric investigation of ternary oxides in the CuO–V2O5 system

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月14日

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  • P. M. Aiswarya,
  • S. Narang,
  • Rimpi Dawar,
  • P. D. Babu,
  • R. Mishra

摘要

In the present study, we present the experimental investigation on thermochemical stability of five compounds in Cu–V–O ternary system i.e., CuV2O6(s), Cu2V2O7(s), Cu3V2O8(s), Cu5V2O10(s) and Cu11V6O26(s). The molar heat capacity of these compounds was determined in the temperature range 2–770 K employing relaxation calorimetry in conjuction with differential scanning calorimetry. The standard molar entropies of formation of the compounds were determined by low temperature heat capacity measurements from 2 to 300 K using relaxation calorimetry. A high temperature oxide melt solution calorimeter was employed to determine the standard molar enthalpy of dissolution of these compounds in sodium molybdate solvent. Using the experimentally obtained thermochemical data, the standard molar enthalpy of formation of these compounds were derived.